Citric,
a. [Cf. F.
citrique. See
Citron.].
Of, pertaining to, or derived from, the citron or lemon; as, citric acid. [1913 Webster]
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.