| Word | Meaning |
|---|---|
| a- | (no longer productive) Towards; Used to indicate direction, reduction to, increase to, change into, or motion. |
| ly- | Alternative form of lyo- (before a vowel) |
| anthropo- | Forming words related to men or people. |
| Hungaro- | Hungary; Hungarian |
| eth- | (organic chemistry) Used as a combining form to denote the presence of 2 carbon atoms in the parent chain when forming names of organic compounds. |
| i- | A form of the prefix in-, used before gn, as in ignoble, ignominy, and ignore. |
| baro- | pressure. |
| Franco- | Relating to France or the French people, language, or culture. |
| a- | (no longer productive) Away from. |
| paleo- | Old; ancient or primitive |
| hexadeca- | sixteen |
| rutheno- | ruthenium |
| i- | (Jamaica) Used to transform English words into words used by Rastafarians with a special meaning. |
| aristo- | Used to mean "the best" or to describe something that aims toward the best. |
| astheno- | (anatomy) asthenia; weakness |
| cupro- | (chemistry) of or pertaining to copper |
| ureo- | urea |
| oeno- | wine, the alcoholic beverage. |
| a- | (no longer productive) Of, from. |
| xyl- | Alternative form of xylo- |
| chondro- | Describing something relating to grains or having a granular structure. |
| i- | Alluding to the Internet. |
| Fitz- | (used in s) Son of; especially used for the illegitimate sons of royalty. |
| galvano- | electricity or galvanism |
| œno- | archaic spelling of oeno- |
| half- | A prefix used before brother, sister, uncle, aunt, and so forth, to indicate that the person being identified is related only through one parent, grandparent, and so forth, rather than two. |
| aden- | Alternative form of adeno- used before vowels. |
| pano- | Alternative form of pan- |
| hyper- | over, above or beyond |
| Arabo- | The combining form of the adjective Arabic. |
| myrmeco- | of or pertaining to ants |
| nom- | law, legislation |
| blenno- | mucus |
| dex- | (in the names of some pharmaceutical drugs) Alternative form of dextro-; denoting a dextrorotatory form. |
| aeolo- | In continuous change. |
| thia- | Used to form the names of chemical compounds containing sulfur, especially such compound in which a sulfur atom replaces an oxygen atom in an analogous compound |
| horo- | time |
| naso- | Relating to the nose. |
| lept- | form of lepto- before a vowel |
| therm- | Alternative form of thermo- |
| condylo- | (anatomy) condyle |
| recto- | (anatomy) rectum |
| synchro- | synchronous; synchronized |
| Copto- | Coptic |
| after- | (rare or no longer productive) With contrary, subordinate, or remote effect; denoting hindrance, setback, inferiority, etc. |
| facio- | (anatomy) face |
| praeter- | Alternative spelling of preter- |
| ventro- | Alternative form of ventri- |
| nyct- | Related to night or darkness. |
| al- | (no longer productive) Alternative form of all- |
| zetta- | In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10, a sextillion. Symbol: Z |
| tubul- | ISV combining form denoting relationship to tubules or microtubules |
| præter- | archaic spelling of preter- |
| al- | Variant of ad- used before the letter L. |
| homoi- | Alternative spelling of homœ- |
| derm- | Alternative form of dermo- |
| Qurano- | Pertaining to the Quran |
| teleo- | end; goal; purpose |
| colpo- | (medicine) Vagina. |
| porto- | (anatomy) portal vein |
| cyto- | (biology) cell. |
| Hispano- | Relating to Spain and Spanish culture. |
| stereo- | Forming words relating to the solid, the three-dimensional. |
| deuter- | A form of deutero- used before a vowel. |
| oleo- | oil or oil-based materials |
| hispano- | Alternative form of Hispano- |
| afore- | Previously. |
| tele- | over a distance |
| micromicro- | (obsolete) Pico- (in the names of SI units) |
| trypano- | trypanosome |
| ptero- | pertaining to wing or feather |
| brepho- | (rare) baby |
| bur- | Placename prefix, indicated site of a fortified place. |
| acro- | sharp |
| luni- | moon |
| homoio- | 'homoi-' + '-o-' |
| antero- | (anatomy dentistry) anterior; front; forward |
| uretero- | (anatomy) ureter |
| glacio- | glacial ice. |
| derma- | dermal |
| hecato- | One hundred; one hundred times. |
| mandibulo- | (anatomy) mandible; mandibular |
| zyg- | union |
| enter- | (obsolete) mutually, between; inter- |
| ultra- | Greater than normal quantity or importance, as in ultrasecret. |
| iso- | equal |
| cyan- | Alternative form of cyano- |
| psammo- | Pertaining to sand |
| gloss- | (chiefly anatomy) tongue |
| oo- | Relating to eggs or ova. |
| sympatho- | (anatomy) sympathetic nervous system |
| enter- | Alternative form of entero- before a vowel. |
| metallo- | metal |
| phyco- | seaweed or algae. |
| physico- | physical; pertaining to physics |
| bar- | Alternative form of bary- |
| somato- | (medicine) body |
| cyno- | Forming compound words having the sense of "dog". |
| oö- | Alternative spelling of oo- |
| adeno- | gland |
| palyno- | pollen |
| homo- | Same. |
| back- | Back in its adverbial senses. |
| bario- | (mineralogy) Used to form the names of minerals in which an element has been replaced by barium |
| deci- | Meaning a tenth part. |
| lepto- | thin, fine, slender |
| homo- | Of or pertaining to homosexuals or homosexuality. |
| toxo- | Alternative form of toxi- or 'tox-'. |
| phon- | Alternative form of phono- |
| ileo- | Of or relating to the ileum. |
| Armeno- | Armenia, Armenian |
| tungsto- | (chemistry) Relating to tungsten. |
| oct- | Form of octa- or octo- used before a vowel. |
| homo- | (organic chemistry) Used to form the names of compounds derived from simpler ones by addition of a methylene group. |
| Turco- | Turkey; Turk. |
| atrio- | (anatomy) atrium |
| pleo- | supernumerary; many |
| Sueco- | Synonym of Swedo- |
| orbito- | (anatomy) orbit |
| myxo- | mucus |
| dehydro- | (organic chemistry) Used to form the names of compounds that have lost one or more hydrogen atoms, especially those that have lost even numbers of hydrogen atoms to form double bonds |
| octa- | eight |
| onco- | Pertaining to tumors. |
| proximo- | ISV combining form denoting proximal location or vector |
| eicosa- | Alternative form of icosa- |
| ant- | A variant form of anti- used before a vowel. |
| logo- | Pertaining to a word or to the act of speech. |
| chalco- | copper, brass etc |
| phosphoro- | (chemistry) phosphorus |
| tropo- | Combining form used in forming words relating to something for which changeability is a defining characteristic. |
| boreo- | northern |
| deutero- | Used to form terms meaning second or secondary |
| sulf- | (chemistry) Alternative form of sulfo-; used before a vowel. |
| zirco- | (chemistry) zirconium |
| ipsi- | self, same |
| regio- | (chemistry) region |
| Catalano- | Relating to Catalan culture, Catalan people or the Catalan language. |
| Czecho- | Czech Republic. |
| dasy- | hairy, shaggy, dense, used in compound words |
| hadro- | hadron; hadronic |
| centi- | hundred; one-hundredth |
| pent- | Alternative form of penta- used before a vowel. |
| hydroxy- | (chemistry) having, or derived from a hydroxyl radical |
| benz- | (organic chemistry) Containing a benzene ring |
| acet- | Alternative spelling of aceto-, used before vowels. |
| zygo- | union |
| matr- | Form of matro- used before a vowel. |
| im- | Expressing negation; not. |
| sept- | Seven: forming words relating to seven. |
| tubulo- | ISV combining form tubule or microtubule |
| Indo- | Relating to India |
| dermat- | Alternative form of dermato- |
| sulfa- | sulfa drugs |
| syl- | with, together, co-, com-. |
| all- | Indicates complete power or authority in an area. |
| ideo- | idea, image. |
| im- | Alternative form of the prefix em-, itself variant of en-. |
| indo- | Alternative form of Indo- |
| nycto- | Alternative form of nyct- |
| diphy- | double, two-fold |
| off- | Away from; off. |
| penta- | five |
| Hurro- | pertaining to Hurrians, especially as a political entity |
| archaio- | Alternative form of archaeo- |
| imid- | Alternative form of imido- |
| septa- | seven |
| auro- | (chemistry mineralogy) gold |
| polyribo- | Forming the names of polyribonucleotides and derived words |
| cuneo- | cuneate |
| unparticularized | |
| fronto- | (anatomy) frontal lobes |
| lith- | stone |
| omphalo- | Relating to the navel. |
| mercurico- | (chemistry) mercuric |
| quadri- | Four. |
| contra- | against |
| insta- | (informal) instant |
| NN | (star) the prefix of catalog entries in the Gliese star catalog, the expansion called the Preliminary Version of the Third Catalogue of Nearby Stars |
| ombro- | Forms words related to rain. |
| mammo- | (biology, medicine) relating to the mammary organs (mammary glands, breasts, udders, and dugs). |
| ento- | Synonym of endo- |
| chorio- | chorion. |
| hyl- | Alternative form of hylo- |
| iris- | Alternative form of irid- |
| limn- | Alternative form of limno- |
| Uralo- | pertaining to Ural, especially as a political entity |
| matri- | mother |
| balneo- | bath |
| cross- | exchange; switch. |
| dichlor- | (chemistry) A form of 'dichloro-' used mainly before a vowel. |
| xylo- | wood |
| parthen- | virgin |
| tris- | (chemistry obsolete) A variant of tri- used to indicate that the component that does not take the prefix occurs three times in the compound: 'tris'phosphuret of copper is PCu; 'tris'benzeneazoresorcinol, CH(OH)(NPh). |
| mon- | Alternative form of mono- |
| cranio- | cranium |
| digi- | digital |
| Malayo- | pertaining to Malay, especially as a political entity |
| yester- | (rare) Belonging to the day preceding the present; next before the present. |
| dermato- | Forms terms pertaining to skin |
| rhizo- | roots (of living organisms). |
| agro- | agriculture |
| physio- | nature |
| atrop- | (organic chemistry) atropisomer |
| di- | two, twice or double |
| lev- | (chemistry) Alternative form of levo-; denoting a levorotatory form. (before a vowel) |
| icosa- | twenty |
| Sino- | A combining form relating to China or the Chinese, in those terms' various senses. |
| di- | A form of dia- before a vowel |
| rheo- | flow, current |
| perma- | permanent, everlasting, eternal |
| arachno- | spider |
| selen- | moon |
| she- | A female, usually an animal. |
| sino- | sinus. |
| denti- | Synonym of dento- |
| adipo- | (anatomy medicine) fat |
| hemi- | Half. |
| Celto- | pertaining to Celts, especially as a political entity |
| alto- | (meteorology) Forms terms related to clouds of middle étage |
| sacculo- | (anatomy) sacculus |
| selen- | (productive in mineralogy; no longer productive in _ chemistry) (containing) selenium |
| uran- | (chemistry) A form of 'urano-' used before a vowel. |
| La- | Used in African-American female given names. |
| Medo- | pertaining to Media, especially as a political entity |
| uran- | Relating to the heavens or to Urania. |
| laryngo- | Of the throat or larynx. |
| hendeca- | eleven |
| aorto- | aorta |
| procto- | Dealing with the colon, rectum and anus. |
| dia- | through, across, between |
| down- | Prefix denoting decrease. |
| æqui- | Obsolete spelling of cap=a |
| pneum- | Abbreviated form pneumon- |
| dichloro- | (chemistry) containing two chlorine atoms |
| hepato- | Pertaining to the liver. |
| co- | together; mutually; jointly |
| pyr- | Alternative form of pyro- |
| ad- | near, at. |
| eco- | ecology or the environment (in the ecological sense) |
| cine- | film, movie |
| fluo- | (chemistry) fluorine |
| spondyl- | Alternative form of spondylo- |
| visuo- | vision |
| brom- | (chemistry) A form of 'bromo-' used before a vowel. |
| dis- | reversal or removal |
| mal- | bad, badly as in maladjusted, malcontent - faulty, faultily as in malfunction |
| entero- | (medicine) relating to the intestines. |
| contro- | against; see contra-. |
| pneumat- | spirit |
| Italo- | Italian |
| batho- | deep |
| cyano- | dark blue-green in colour |
| spheno- | (anatomy) sphenoid bone |
| desoxy- | Alternative spelling of deoxy- |
| glosso- | 'gloss-' + '-o-' |
| cerauno- | thunderbolt, thunder, lightning. |
| tiru | prefix of many words used exclusively in the cant of Vaishnavas and Saivas in Tamil Nadu, also to precede names of holy places like Tirumala and Tirupati. It is equivalent to Sri the saintly, the holy, sacred. |
| italo- | Alternative form of Italo- |
| skeleto- | skeleton |
| limno- | lake, pond |
| partheno- | 'parthen-' + '-o-' |
| urethro- | (anatomy) urethra |
| vigen- | twenty |
| Brit- | British |
| hist- | Alternative form of histo- used before vowels. |
| metro- | Short for metropolitan: of or relating to the city. |
| quinqu- | Alternative form of quinque- used before a vowel. |
| dipl- | Alternative form of diplo- used before a vowel. |
| or- | (no longer productive) From the outset; original; out; out of; without. |
| dwi- | (chemistry dated) A designation prefix for undiscovered chemical elements lying two periods under a known element in the periodic table. (For example, rhenium was called dwi-manganese before its discovery in 1926.) |
| metro- | (medicine) Relating to the uterus. |
| apo- | away from, or separate |
| sero- | combining form serum |
| nether- | low, lower, below, under, beneath. |
| kerauno- | thunderbolt, thunder, lightning. |
| vas- | vas deferens |
| geronto- | pertaining to old age or those of old age |
| odonto- | tooth |
| phlebo- | Relating to veins |
| but- | (organic chemistry) Denotes the presence of four carbon atoms in the parent chain when forming names of organic compounds. |
| atlanto- | (anatomy) atlas |
| pluri- | several |
| musculo- | (anatomy) muscle |
| pseph- | pebble, small stone |
| vice- | Taking the place or rank of (another person); deputy. |
| grammatico- | grammar |
| tessara- | four |
| klado- | (inorganic chemistry) a very open boron structure |
| mero- | part |
| viscero- | Forming compound words concerning viscera. |
| gravo- | (chiefly typography) grave (accent) and — |
| maxi- | Denotes a larger than usual version of an item. |
| Tibeto- | Of or pertaining to Tibet. |
| hylo- | matter |
| semio- | semiotics |
| actin- | Alternative form of actino- |
| tachi- | Alternative form of tachy- |
| out- | External to, on the outside of |
| taxo- | order, arrangement |
| neuro- | Forming compound words relating to nerves, nerve tissue, or the nervous system. |
| Lacono- | pertaining to Sparta, especially as a political entity |
| peroxy- | (chemistry) Used to name compounds containing the divalent peroxy -O-O- radical |
| milli- | In the International System of Units and other metric systems of units, one-thousandth of the unit to which it is prefixed; that is, multiplying the unit to which it is attached by 10. Symbol: m. |
| atropo- | Alternative form of atrop- |
| spondylo- | spine |
| psepho- | 'pseph-' + '-o-' |
| psych- | Alternative form of psycho- |
| chion- | snow |
| sapr- | Alternative form of sapro- |
| sec- | (organic chemistry) secondary-form of a functional group, a branched functional group |
| platini- | (chemistry) platinic |
| meno- | month |
| phago- | eating; consuming |
| gain- | Prefix meaning "against", "contrary to", "in opposition to", "counter-". |
| quinque- | five |
| olfacto- | smell |
| tetr- | Form of tetra- used before a vowel. |
| twi- | (rare or no longer productive) two |
| carbo- | (chemistry) carbon |
| hect- | Form of hecto-—meaning 100—used before a vowel. |
| dys- | bad |
| selenio- | (chemistry) selenium |
| muci- | mucus |
| multi- | More than one; pertaining to more than one thing. |
| ir- | Used for expressing negation; not |
| Britanno- | pertaining to Britannia, especially as a political entity |
| diplo- | double |
| homeo- | identity, sameness |
| con- | (non-productive) used with certain words to add a notion similar to those conveyed by with, together, or joint |
| nemat- | (chiefly biology) Characteristic of, pertaining to, or possessing a filiform structure. |
| steth- | Alternative form of stetho- |
| dors- | Prevocalic form of dorso- |
| paedo- | (British spelling) Alternative spelling of pedo- |
| tetra- | four. |
| thaumat- | Alternative form of thaumato- |
| sex- | A form of sexa-, meaning six. |
| con- | attached to certain words to obtain new, informal, subcultural words in which 'con-' conveys a notion of: |
| fluor- | (chemistry) Alternative form of fluoro- used before a vowel. |
| nemat- | nematode |
| vesico- | bladder |
| linguo- | (anatomy phonology) tongue |
| retro- | Back or backward. |
| pædo- | Obsolete spelling of paedo- |
| histi- | Alternative form of histo-. |
| salpingo- | (medicine) Mesosalpinx: pertaining to the Fallopian tubes. |
| entomo- | insect |
| sapro- | putrid, rotten matter |
| bacter- | Alternative form of bacterio- |
| nepho- | cloud |
| gibi- | The IEC prefix meaning 2 = 1,024 = 1,073,741,824. Compare giga-, meaning 10 = 1,000 = 1,000,000,000, a billion. |
| striato- | (anatomy) striatum |
| imido- | (organic chemistry) Of or pertaining to an imide. |
| stetho- | (anatomy) chest |
| dimethylimidazol- | (chemistry) Dimethylimidazole, within a larger chemical formula |
| Mac | (Irish and Scottish patronymic surnames) son of. |
| malto- | (chemistry) maltose |
| thaumato- | miracle, wonder, marvel |
| hyps- | Height. |
| phragmo- | obstruction, barrier |
| mono- | one |
| plani- | flat, level, plane |
| plesio- | Close, near. |
| nona- | nine |
| pseud- | Shortened form of pseudo-, used before a noun. |
| brady- | slow |
| taut- | Alternative form of tauto- |
| thanato- | death |
| hyps- | Aloft, on high. |
| in- | in, into, towards, within. |
| pneumato- | 'pneumat-' + '-o-' |
| Inver- | mouth of a river; confluence |
| sporo- | spore |
| step- | A prefix used before father, mother, brother, sister, son, daughter, child, and so forth, to indicate that the person being identified is not a blood relative but is related through the marriage of a parent. |
| ego- | Relating to the self |
| arithmo- | numbers; arithmetic |
| in- | in, into |
| info- | information. |
| dextro- | Right; on the right; toward the right. |
| haplo- | single |
| pali- | recurrence, repetition |
| chrys- | Alternative form of chryso- |
| in- | (non-productive) Used with certain words to reverse their meaning |
| platino- | (chemistry) platinic |
| luteo- | (chemistry) orange-yellow; brownish yellow |
| palae- | variant of "paleo-" used before vowels |
| Scytho- | pertaining to Scythia, especially as a political entity |
| phospho- | (chemistry) phosphorus |
| extra- | outside, beyond. |
| bacteri- | Alternative form of bacterio- |
| sito- | food, especially grain |
| laparo- | (medicine anatomy) flank, side |
| bronto- | thunder |
| palæ- | archaic form of paleo- |
| teno- | (medicine anatomy) tendon |
| cholangio- | (anatomy) bile duct |
| Serbo- | Serbia. |
| strato- | strata; especially, stratus clouds |
| maxillo- | Of, or relating to, the maxilla. |
| end- | internal, within, inside, into |
| tibio- | tibia |
| hypsi- | Height. |
| ilio- | (anatomy) Pertaining to the ilium. |
| uveo- | uvea |
| video- | Forms terms relating to moving images, and especially to television |
| Norvego- | pertaining to Norway, especially as a political entity |
| hypsi- | Aloft, on high. |
| pharma- | Pertaining to pharmaceuticals or pharmacology. |
| ichn- | Alternative form of ichno- |
| triskaideka- | thirteen |
| inguino- | (anatomy) inguen; groin |
| urano- | (chemistry) uranium |
| oxi- | (chemistry) Obsolete spelling of oxy- |
| zinco- | (chemistry) containing, or combined with, or using zinc |
| placo- | (chiefly palaeontology) Provided with or relating to a flat plate or plates. |
| toco- | Relating to childbirth. |
| nemato- | (compound prefix) nemat- + -o- |
| urano- | (astronomy) of the heavens |
| tauto- | Used to form words indicating repetition or sameness. |
| aniso- | Forming compounds words having the sense ‘unequal’ (often formed to contrast with similar words in iso-). |
| Perso- | Persian |
| sexa- | six. |
| haem- | Alternative form of haemo- |
| aer- | prevocalic form aero- |
| heli- | helicopter |
| zebi- | The IEC prefix meaning 2 = 1,024 = 1,180,591,620,717,411,303,424. Compare zetta-, meaning 10 = 1,000 = 1,000,000,000,000,000,000,000, a sextillion. |
| holo- | whole |
| viginti- | twenty. |
| where- | Which, what, whom: compounded with prepositions to form compound relative and interrogative pronouns. |
| hæm- | Alternative form of haem- |
| aër- | Alternative spelling of aer- |
| masto- | Alternative form of mast- |
| the- | (religion) god or deity |
| hecto- | In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 100. Symbol: h |
| infero- | (anatomy) inferior |
| potam- | Alternative form of potamo- |
| visco- | (physics) viscosity |
| seleno- | 'selen-' + '-o-' |
| areo- | Mars |
| platinoso- | (chemistry) platinous |
| myel- | Alternative form of myelo- |
| Slovako- | pertaining to Slovakia, especially as a political entity |
| proteo- | protein |
| Syro- | Syria |
| tachy- | fast |
| even- | (rare dialectal or no longer productive) Prefix occurring mostly in older terms, bearing the meaning of equal-, co-, fellow-, joint-. |
| udi- | (soil science) udic |
| sulphureo- | (obsolete) Used as a combining form to indicate sulphureous and some other property |
| accelero- | acceleration |
| retino- | retina |
| hexahedro- | (chemistry) having eight atoms, bound into a hexahedron (cube) |
| schm- | Used to form a reduplicated rhyming compound of any word in order to express disparagement, dismissal, or derision. |
| franken- | Indicating artificiality or combination of disparate elements, often terrifying or unattractive. |
| wan- | (no longer productive except in _ Scotland) Preceding nouns and adjectives with the sense ‘bad, un-’ |
| palaeo- | Alternative spelling of paleo- |
| thermo- | heat |
| enantio- | opposite, opposed, opposing |
| mela- | Forms words relating to black or dark |
| hypso- | Height. |
| semanto- | semantic |
| dactyl- | Alternative form of dactylo- |
| quasi- | Similar to, but not exactly the same as; virtual(ly). |
| glycero- | (organic chemistry) Derived from glycerol |
| palæo- | archaic spelling of paleo- sort=palaeo- |
| hypho- | (inorganic chemistry) a relatively open boron structure |
| perineo- | (anatomy) perineum |
| hypso- | Aloft, on high. |
| ichno- | trace |
| nor- | (organic chemistry) a compound derived from another by removal of a radical, especially by removal of methyl or methylene |
| enviro- | environmental or environmentalist. |
| phyllo- | leaf, leaves. |
| potamo- | river |
| vasculo- | blood vessel |
| aceto- | (organic chemistry) Containing a methyl group bonded to a carboxyl group. |
| tetrakis- | (mathematics) A variant of tetra-, used for multiplication with a second numerical prefix. |
| pharmaco- | medication |
| nano- | In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10. Symbol: n |
| pro- | agreeing with; supporting; favouring |
| velo- | Pertaining to a velum, usually the velum palatinum (soft palate, palatum molle). |
| magnesio- | Pertaining to magnesium. |
| tephro- | ash |
| bacterio- | (microbiology) bacteria |
| pro- | earlier; prior |
| gymno- | naked |
| opsono- | opsonin |
| myso- | dirt, filth |
| dorsi- | dorsal |
| hemo- | Alternative spelling of haemo- |
| pancreato- | pancreas |
| chromo- | (chemistry) chromium |
| atto- | In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10. Symbol: a |
| pneumo- | 'pneum-' + '-o-' |
| bathy- | deep, especially deep sea |
| utero- | uterus |
| olig- | Alternative form of oligo-, used before a vowel. |
| by- | (usually non-productive) town or city |
| actino- | (biology) radial; ray |
| roto- | rotation |
| histo- | (biology) tissue |
| patr- | Form of patro- used before a vowel. |
| picro- | bitter |
Note: these words have been obtained from Wiktionary and have been classified and improved through automated computer linguistics processes.