From Longman Dictionary of Contemporary EnglishRelated topics: Plantscitruscit‧rus /ˈsɪtrəs/ noun [countable]1HBP (also citrus tree) a type of tree that produces citrus fruits2 (also citrus fruit) a fruit with thickskin, such as an orange or lemon —citrus adjectiveExamples from the Corpuscitrus• She could taste him, round and warm and citrus, deep and cinnamon.• They may give out scents of citrus, mint, pine or rose, and most make wonderfulpatio plants.• The pervadingcitrussmell of aftershave, the same smell that had saturated Brady's apartment and Feldman's studio.• The best way to preparecitrus for composting is to cut the fruit up so it can break down easier.• Several low rise hotels, backed by quietcitrusgroves, are spaced around the half milebay.• The acidity in the citrus is excellent for raising the acid level in the compost heap.Origincitrus(1800-1900)Modern LatinLatin, “citron tree”