Main Entry:

²acid

Function:

noun

Date:

1696

1: a sour substance ; specifically : any of various typically water-soluble and sour compounds that in solution are capable of reacting with a base to form a salt, redden litmus, and have a pH less than 7, that are hydrogen-containing molecules or ions able to give up a proton to a base, or that are substances able to accept an unshared pair of electrons from a base2: something incisive, biting, or sarcastic <a social satire dripping with acid>3: lsd

— ac·idy \ˈa-sə-dē\ adjective