HBAa small monkey from northern India that is often used in medical tests 恒河猴〔产于印度北部，常用于医学实验〕
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.
Originrhesus monkey
(1800-1900)Rhesus in ancient Greek stories, a king of Thrace