Definitions of acid

  1. a powerful hallucinogenic drug
  2. A sour substance.
  3. A sour substance, usually liquid; that which combines with a base to form a salt.
  4. A sour substance: ( chem.) one of a class of substances, usually sour, which turn vegetable dyes to red, and combine with alkalies, metallic oxides, etc., to form salts.
  5. A sour substance; that which unites with a base to form a salt.
  6. Any sour substance.
  7. A compound of hydrogen capable of uniting with a a bse to form a salt.
  8. A sour substance; a substance capable of uniting with salifiable bases and forming salts.
  9. Something which causes sourness to the taste.
  10. any of various water- soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
  11. containing acid; " an acid taste"
  12. Sour, sharp, or biting to the taste; tart; having the taste of vinegar: as, acid fruits or liquors. Also fig.: Sour- tempered.
  13. One of a class of compounds, generally but not always distinguished by their sour taste, solubility in water, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radical, either alone, or more generally with oxygen, and take their names from this negative element or radical. Those which contain no oxygen are sometimes called hydracids in distinction from the others which are called oxygen acids or oxacids.
  14. Sour, and sharp or biting to the taste, as vinegar.
  15. Sharp: sour.
  16. Sharp to the taste, as vinegar; sour; of or like an acid.
  17. Sour and sharp to the taste.
  18. Sour; sharp; biting to the taste.