noun, often attrib \ˈsi-trəs\

Definition of CITRUS

capitalized : a genus of often thorny trees and shrubs of the rue family (Rutaceae) grown in warm regions for their edible fruit (as the orange, lemon, lime, or mandarin) with firm usually thick rind and pulpy flesh
plural citruses or citrus : any plant or fruit of the genus Citrus or a related genus

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