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rhesus monkey Line breaks: rhe¦sus mon¦key
Pronunciation: /ˈriːsəsmʌŋki/
(also rhesus macaque)

Definition of rhesus monkey in English:


A small brown macaque with red skin on the face and rump, native to southern Asia. It is often kept in captivity and is widely used in medical research.
  • Macaca mulatta, family Cercopithecidae
Example sentences
  • To better understand how taste perception may vary among humans and apes, we sequenced the T2R gene repertoires of a human and all extant ape species (chimpanzee, bonobo, gorilla, orangutan) as well as a rhesus macaque and a baboon.
  • Concentrations of relaxin in the plasma of the human, the rhesus monkey, and the marmoset during the peri-implantation period implicate relaxin as being involved in this critical period of feto-maternal interaction in these species.
  • Research on a fellow primate, the rhesus monkey, reveals a gender gap in spatial cognition, but one that it is easily overcome with training.


Early 19th century: modern Latin rhesus, arbitrary use of Latin Rhesus (from Greek Rhēsos, the name of a mythical king of Thrace).

Definition of rhesus monkey in:
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