Citric \Cit"ric\, a. [Cf. F. citrique. See Citron.]

(Chem.) Of, pertaining to, or derived from, the citron or lemon; as, citric acid.

Citric acid (Chem.), an organic acid, C3H4OH.(CO2H)3, extracted from lemons, currants, gooseberries, etc., as a white crystalline substance, having a pleasant sour taste.

Source: Webster's Revised Unabridged Dictionary (1913)