ˈsi.trəs noun
Usage: often attributive
Etymology: New Latin, from Latin, citron tree — more at citron
1. capitalized : a genus of often thorny trees and shrubs (family Rutaceae) having alternate unifoliolate leaves with a winged petiole, tetramerous flowers with many stamens, and large baccate fruits with pulpy endocarp and firm exocarp, including the orange, lemon, lime, and related fruits, and being native to tropical Asia but now widely cultivated for their fruits — compare citrange , kumquat , mandarin , shaddock , tangelo
2. plural citruses or citrus : any plant or fruit of the genus Citrus or related genera
3. : sulphur yellow 2