English

Definition of rhesus monkey noun from the Oxford Advanced Learner's Dictionary

 

rhesus monkey

 noun
noun
BrE BrE//ˈriːsəs mʌŋki//
 
; NAmE NAmE//ˈriːsəs mʌŋki//
 
 
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a small S Asian monkey, often used in scientific experiments Word Origin early 19th cent.: modern Latin rhesus, arbitrary use of Latin Rhesus (from Greek Rhēsos, the name of a mythical king of Thrace).
See the Oxford Advanced American Dictionary entry: rhesus monkey