Acid

English Meaning

Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour- tempered.

1. Chemistry Any of a class of substances whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals to form salts.
2. Chemistry A substance that yields hydrogen ions when dissolved in water.
3. Chemistry A substance that can act as a proton donor.
4. Chemistry A substance that can accept a pair of electrons to form a covalent bond.
5. A substance having a sour taste.
6. The quality of being sarcastic, bitter, or scornful: wrote with acid about her first marriage.
7. Slang See LSD1.
8. Chemistry Of, relating to, or containing an acid.
9. Chemistry Having a high concentration of acid.
10. Chemistry Having the characteristics of an acid.
11. Having a pH of less than 7.
12. Having a relatively high concentration of hydrogen ions.
13. Geology Containing a large proportion of silica: acid rocks.
14. Having a sour taste. See Synonyms at sour.
15. Biting, sarcastic, or scornful: an acid wit; an acid tone of voice.