名詞 citrus:

1. any of numerous fruits of the genus Citrus having thick rind and juicy pulp; grown in warm regions
   同義詞：citrus fruit, citrous fruit
2. 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
   同義詞：citrus tree

1. A sliver of citrus peel twisted over or dropped into a beverage for flavoring.
   橘子皮放入或加入飲料中調(diào)味的一小塊橘子皮
2. Oranges and lemons are citrus fruits.
   桔子和檸檬是柑桔屬水果。

cit.rus

n.（名詞）
【復(fù)數(shù)】 citrus 或 cit.rus.es
Any of various evergreen, usually spiny shrubs or trees of the genusCitrus, such as the grapefruit, lemon, or orange, native to southern and southeast Asia, having leathery, aromatic, unifoliolate compound leaves and widely cultivated for their juicy, edible fruits that have a leathery, aromatic rind.
柑橘屬果樹：一種柑橘屬 的常綠、通常帶刺的灌木，例如葡萄柚、檸檬或柑桔，原產(chǎn)于南亞和東南亞，有堅韌、芳香、具有一小葉的復(fù)葉，因其結(jié)硬皮、芳香、多汁的可食用果實而得到廣泛栽植
The fruit of any of these plants.
柑橘：這些植物中任何一種的果實
adj.（形容詞）
Of or relating to any of the citrus plants or their fruits.
柑橘屬的：柑橘屬植物或其果實中的任何一種的

來源：
Latin [citron tree]
拉丁語 [香櫞樹]