• WordNet 3.6
    • n citrus any of numerous fruits of the genus Citrus having thick rind and juicy pulp; grown in warm regions
    • n citrus any of numerous tropical usually thorny evergreen trees of the genus Citrus having leathery evergreen leaves and widely cultivated for their juicy edible fruits having leathery aromatic rinds
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Webster's Revised Unabridged Dictionary
  • Interesting fact: The citrus soda "7 UP" was created in 1929. The original name of the popular drink was "Bib-Label Lithiated Lemon-Lime Soda", but it got changed to "7 UP."
    • Citrus (Bot) A genus of trees including the orange, lemon, lime, tangerine, citron, grapefruit, etc., originally natives of southern Asia.
    • Citrus (Bot) any tree belonging to the genus Citrus, having leathery evergreen leaves and bearing a soft pulpy fruit covered by a thick skin; -- called also citrus tree.
    • Citrus (Bot) the fruit of a tree belonging to the genus Citrus, having a thick shiny skin and a soft, sweet to tart pulp.
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Century Dictionary and Cyclopedia
  • Interesting fact: Captain Cook lost 41 of his 98 crew to scurvy (a lack of vitamin C) on his first voyage to the South Pacific in 1768. By 1795 the importance of eating citrus was realized, and lemon juice was issued on all British Navy ships.
    • n citrus A citron-tree; in general, any tree or fruit of the genus Citrus: as, citrus-culture; the citrus trade.
    • n citrus [capitalized] A genus of small trees, natural order Rutaceæ, with pinnate but apparently simple coriaceous and punctate leaves upon usually winged petioles. The flowers are white and fragrant, with numerous stamens united by their filaments into several irregular bundles. The fruit is pulpy, with a spongy rind. To this genus belong the orange, C. Aurantium, of which the kumquat is a variety; the shaddock and pumelo, C. decumana; the lemon and citron, C. medica; and the lime, which probably originated from C. Hystrix.
    • ***


Webster's Revised Unabridged Dictionary
L., a citron tree


In literature:

I conceive that I must not confound the tree citrus, with that of the fruit citrum.
"The History of The Decline and Fall of the Roman Empire Volume 5" by Edward Gibbon
Their specialty is citrus fruits, but their products are not limited to that line.
"Cuba, Old and New" by Albert Gardner Robinson
For example the "California Citrus Fruit Growers' Association," which sells oranges, lemons, grape fruit, etc.
"A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public" by Frank Bertram Wade
"Cooking and Dining in Imperial Rome" by Apicius
In the north the grains and cereals were grown, and in the south the citrus and the orange.
"History of Human Society" by Frank W. Blackmar
We'd hit the Florida west coast too late for the citrus season, so I went in for the fishing instead.
"To Remember Charlie By" by Roger Dee
Climate and soil conditions permit the cultivation of citrus fruits in this southernmost area of Albania.
"Area Handbook for Albania" by Eugene K. Keefe
Prosper, the old freedman, was pushing forward the citrus wood dining-table, which ran on rollers.
"A Captive of the Roman Eagles" by Felix Dahn
For fifteen years past, three-fourths of the citrus growers of California have been cooperating successfully and are most efficiently organized.
"The Challenge of the Country" by George Walter Fiske
This fiercely-spined Citrus is hardy, but rarely flowers and fruits in the north.
"Trees and Shrubs for English Gardens" by Ernest Thomas Cook

In news:

Bar Harbor Inn's Wine and Citrus Poached Pear with Triple Creme Cheese.
A tiny pest capable of carrying and spreading a disease deadly to citrus trees has been found in the heart of California's citrus belt, agriculture officials said Monday.
Grapefruit juice sales are rising significantly for the first time in decades, due to improvements in product taste, according to the Florida Department of Citrus.
Previously available in 16-ounce cans in Citrus Orange flavor, this summer Unwind will launch Goji Grape, Pom Berry and Citrus Orange in 12-ounce cans containing 40 calories and 10 grams of sugar each.
Aceitunas citrus & herb marinated house olives 3.
Google honors the Hungarian scientist-turned-freedom-fighter-turned-covert-diplomat today with a citrus-packed doodle.
Camelot Cellars has only a couple of bottles of this $12 viognier infused with mango and citrus juices left.
But this is also the time of year when citrus is in full force.
Cabernet cannot do citrus justice.
The Gless Ranch citrus grove Navy BOB PRATTE/STAFF PHOTOGRAPHER.
I witnessed a panoramic view on a dawn bike ride that seemed quite out of place in the gorgeous citrus groves of Valle Vista.
The Citrus County Sheriff's Office have arrested three men who they said are.
Fried Artichokes With Citrus & amp ; Parsley.
Total economic impact of citrus greening, including indirect effects, was $4.54 billion, or $908 million annually , over the years 2006 through 2011.
Citrus Spritzer works with an element of fun.