| Word | Meaning |
|---|---|
| A | The highest rank on any of various scales that assign letters. |
| ucd | Alternative spelling of µcd |
| uK | Alternative spelling of µK |
| IRR | Iranian rial |
| a | Distance from leading edge to aerodynamic center. |
| riyal | The arabic symbol for the riyal : ﷼ |
| AAC | American Cement Corporation, stock exchange symbol. |
| Isp | (rocketry) Abbreviation of lang=en |
| PRO | (syntax) A theoretical phonologically null pronoun |
| li | (math) Logarithmic integral function |
| pineapple | (U.S. Old South obsolete) In the Old South, a pineapple placed over the entrance of a house meant the homeowner was home and providing hospitality to visitors. |
| Rs | rupees |
| Rs. | altform Rs rupees |
| ae | Variant of æ. |
| Æ | (chiefly dated or linguistic) Ligature of vowels A and E, called ash. |
| cosh | (trigonometry) The symbol of the hyperbolic function hyperbolic cosine. |
| Ns | (meteorology) Nimbostratus. |
| cr | crore |
| Cs | (meteorology) cirrostratus |
| ug | Alternative spelling of µg |
| mGal | (metrology) The acceleration of one thousandth of a Gal; milligal. |
| Ger⁺⁶ | (music) German augmented sixth chord |
| KB | kilobyte, also written as kB |
| rial | |
| umol | Alternative spelling of µmol |
| Gal | (metrology) The symbol for the cgs unit of acceleration, gal or galileo. |
| Œ | (chiefly dated) Ligature of vowels O and E, called œthel. |
| a/A | (medical) Arterial to alveolar oxygen ratio. |
| Unsupported titles/Greater than | (internet slang) Used to quote a person, especially to emphasize what was said and make fun of the person. |
| SM | service mark |
| Ob | (category theory) The set of objects of a category. |
| Fr⁺⁶ | (music) French augmented sixth chord |
| TM | trademark |
| Re | rupee |
| eH | Symbol for redox potential (in volts). |
| us | Alternative spelling of µs |
| AAA | (sports North America) The highest level of minor league baseball, often used by extension in other sports to indicate the highest level of minor league play in that sport as well. |
| hph | horsepower-hour |
| Cn | (element symbol) Symbol for copernicium. |
| XXX | Traditional brewer's mark for barrels of "extra strong" beer - extended to other alcoholic beverages and other products having an "extra strong" dimension (varying from washing soap to pornography). |
| It⁺⁶ | (music) Italian augmented sixth chord |
| mAh | milliampere-hour |
Note: these words have been obtained from Wiktionary and have been classified and improved through automated computer linguistics processes.