Definition of citrus noun from the Oxford Advanced American Dictionary

 

citrus

 noun
noun
NAmE//ˈsɪtrəs//
 
[uncountable]
 
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fruit belonging to the group of fruit that includes oranges, lemons, limes, and grapefruit citrus fruit/trees/growers fabric in bright citrus shades (= orange, yellow, or green)
See the Oxford Advanced Learner's Dictionary entry: citrus