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citrus fruits

citrus fruits, widely used edible fruits of plants belonging to Citrus and related genera of the family Rutaceae (orange family). Included are the tangerine, citrange, tangelo, orange, pomelo, grapefruit, lemon, lime, citron, and kumquat. Almost all the species bearing edible fruits are small trees native to SE Asia, Indonesia, or Malaysia. The citron was introduced to the Mediterranean area from Asia before the advent of Christianity; the others were spread chiefly by the Arabs during the Middle Ages. Introduced throughout Europe during the Crusades, they were brought by Portuguese and Spanish explorers to the West Indies, whence they were introduced into North and South America. Commercially they are now the most important group of tropical and subtropical fruits in the world. The fruits are rich in vitamin C (ascorbic acid), various fruit acids (especially citric acid), and fruit sugar. The rind, which contains numerous oil glands, and the fragrant blossoms of some species are also a source of essential oils used for perfumes and similar products. Citrus fruits can be damaged by freezing temperatures, pests (scale insects, rust mites), and various bacterial, viral, and fungal diseases (e.g., citrus canker, greening, tristeza, and melanose).

See W. Reuther, ed., The Citrus Industry (3 vol., 1968–78); R. W. Ward and R. L. Kilmer, The Citrus Industry (1989).

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Citrus

Citrus Genus of trees with fleshy, juicy fruits; there is considerable confusion over the names because of hybridization and mutations. Sweet orange Citrus sinensis; various cultivars including Valencia, Washington navel, Shamouti. Sour, bitter, or Seville orange, C. aurantium, is too bitter to eat and is used for marmalade. Lemon, C. limon. Lime, C. aurantifolia. Citron, C. medica, has thick, white inner skin and is used mainly to make candied peel. Pomelo (shaddock), C. grandis, is the parent of the grapefruit. Grapefruit, C. paradisi, is a hybrid of pomelo and sweet orange. Tangerine, satsuma, mandarin, calamondin, and naartje are small fruits with loose skins. Clementine, a hybrid of tangerine and bitter orange, is sometimes regarded as a variety of tangerine. Mineola is a hybrid of grapefruit and tangerine. Ortanique is a hybrid of orange and tangerine. Citrange is a hybrid of citron and orange. Tangors are hybrids of tangerine and sweet orange. Ugli fruit is a hybrid of grapefruit and tangerine. Tangelo is a hybrid of tangerine and pomelo. All are a rich source of vitamin C and contain up to 10% sugars (glucose and fructose).

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"Citrus." A Dictionary of Food and Nutrition. . Encyclopedia.com. 22 Apr. 2017 <http://www.encyclopedia.com>.

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citrus

citrus Important group of trees and shrubs of the genus Citrus in the rue family. They include grapefruit, kumquat, lemon, lime, orange, tangerine and ugli, and are native to subtropical regions. The stems are usually thorny, the leaves bright green, shiny and pointed. The flowers are usually white, waxy and fragrant. The fruit (hesperidium) is usually ovoid with a thick, aromatic rind. The inside of the fruit is pulpy and juicy and is divided into segments that contain the seeds. Most citrus fruits contain large amounts of vitamin C. Family Rutaceae.

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"citrus." World Encyclopedia. . Encyclopedia.com. 22 Apr. 2017 <http://www.encyclopedia.com>.

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citrus

cit·rus / ˈsitrəs/ • n. (pl. citruses) a tree of the rue family belonging to the genus Citrus, which includes citron, lemon, lime, orange, and grapefruit. Native to Asia, citrus trees are widely cultivated in warm countries for their fruit, which has juicy flesh and pulpy rind. ∎  (also citrus fruit) a fruit from such a tree. • adj. (also citrous) of or relating to these trees or their fruits. DERIVATIVES: cit·rus·y adj. .

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"citrus." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 22 Apr. 2017 <http://www.encyclopedia.com>.

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Citrus

Citrus (family Rutaceae) A genus of plants, many of which are in cultivation for their fruit: sweet orange is C. sinensis, sour (or Seville) orange C. aurantium, grapefruit C. paradisi, lemon C. limon, lime C. aurantiifolia, and there are others. The leaves are simple, the stalk often winged. The fruit is a hesperidium. There are about 16 species, native to South-east Asia.

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"Citrus." A Dictionary of Plant Sciences. . Encyclopedia.com. 22 Apr. 2017 <http://www.encyclopedia.com>.

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citrus

citrusArras, embarrass, harass •gynandrous, polyandrous •Pancras • charas • Tatras • disastrous •ferrous • leprous • ambidextrous •Carreras, mayoress •scabrous •cirrus, Pyrrhus •chivalrous •citrous, citrus •ludicrous • tenebrous •Cyrus, Epirus, papyrus, virus •fibrous • hydrous • Cyprus •retrovirus • monstrous •brachiosaurus, brontosaurus, canorous, chorus, Epidaurus, Horus, megalosaurus, pelorus, porous, sorus, stegosaurus, Taurus, thesaurus, torus, tyrannosaurus •walrus •ochrous (US ocherous) •cumbrous • wondrous • lustrous •Algeciras, Severus •desirous •Arcturus, Epicurus, Honduras •barbarous • tuberous • slumberous •Cerberus • rapturous •lecherous, treacherous •torturous • vulturous • Pandarus •slanderous • ponderous •malodorous, odorous •thunderous • murderous •carboniferous, coniferous, cruciferous, melliferous, odoriferous, pestiferous, somniferous, splendiferous, umbelliferous, vociferous •phosphorous, phosphorus •sulphurous (US sulfurous) •Anaxagoras, Pythagorasclangorous, languorous •rigorous, vigorous •dangerous • verdurous •cankerous, cantankerous, rancorous •decorous • Icarus • valorous •dolorous • idolatrous •amorous, clamorous, glamorous •timorous •humerus, humorous, numerous •murmurous • generous • sonorous •onerous • obstreperous • Hesperus •vaporous • viviparous • viperous •Bosporus, prosperous •stuporous • cancerous •Monoceros, rhinoceros •sorcerous • adventurous • Tartarus •nectarous • dexterous • traitorous •preposterous • slaughterous •boisterous, roisterous •uterus • adulterous • stertorous •cadaverous • feverous •carnivorous, herbivorous, insectivorous, omnivorous •Lazarus

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"citrus." Oxford Dictionary of Rhymes. . Encyclopedia.com. 22 Apr. 2017 <http://www.encyclopedia.com>.

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