Acid

as′id, adj. sharp: sour.— n. a sour substance: ( chem. ) one of a cla of substances, usually sour, which turn vegetable blues to red, and combine with alkalies, metallic oxides, . to form salts.— adj. Acid′ifiable , capable of being converted into an acid.— ns. Acidificā′tion ; Acid′ity , the quality of being acid or sour—also Ac′idne .— v.t. Acid′ulate , to make slightly acid. [L. ac-ēre , to be sour—root ak , sharp.]