From Longman Dictionary of Contemporary Englishrhesus monkeyrhesus mon‧key /ˈriːsəs ˌmʌŋki/ noun [countable] HBAa small monkey from northern India that is often used in medical tests
Examples from the Corpus
rhesus monkey• In the gardens of a Buddhist temple somewhere in the Far East sat a contented looking rhesus monkey.• Several storeys below, in a cage in the research and development department, sat an unhappy looking rhesus monkey.Origin rhesus monkey (1800-1900) Rhesus in ancient Greek stories, a king of Thrace 