Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
A brown to grayish monkey (Macaca mulatta) found from Pakistan to eastern China and used extensively in biological and medical research.
(Animals) a macaque monkey, Macaca mulatta, of S Asia: used extensively in medical research
[C19: New Latin, arbitrarily from Greek Rhesos Rhesus]
rhe′sus mon′key(ˈri səs)
a macaque, Macaca mulatta, of India, used in biological and medical research. Also called rhe′sus.
[1830–40; < New Latin, appar. use of name of a Thracian king < Greek Rhêsos]
A small, yellowish-brown monkey of India, widely used in biological and medical research. The Rh (Rhesus) factor was first discovered in rhesus monkeys.