CITRUS

[cit.rus] n, pl citrus or cit.rus.es often attrib [NL, genus name, fr. L] (1825): any of a group of often thorny trees and shrubs (Citrus and related genera) of the rue family grown in warm regions for their edible fruit (as the orange or lemon) with firm usu. thick rind and pulpy flesh; also: the fruit -- cit.rusy adj