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rhesus

[ ree-suhs ]
/ ˈri səs /
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noun

a macaque, Macaca mulatta, of India, used in experimental medicine.

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Origin of rhesus

1830–40; <New Latin, arbitrary use of Latin Rhēsus name of a Thracian king allied with Troy <Greek Rhêsos
rhe·sian [ree-shuhn], /ˈri ʃən/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for rhesus

Rhesus
/ (ˈriːsəs) /

noun

Greek myth a king of Thrace, who arrived in the tenth year of the Trojan War to aid Troy. Odysseus and Diomedes stole his horses because an oracle had said that if these horses drank from the River Xanthus, Troy would not fall
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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