acid

¹ac·id

adj \ˈas-əd\

Definition of ACID

1

: sour, sharp, or biting to the taste

2

a : of, relating to, or being an acid; also : having the reactions or characteristics of an acid <an acid solution> b of salts and esters : derived by partial exchange of replaceable hydrogen <acid sodium carbonate NaHCO₃> c : marked by or resulting from an abnormally high concentration of acid <acid indigestion>—not used technically