Macaque n. (Zool.) Any one of several species of short-tailed monkeys of the genus Macaca (formerly Macacus), found in rocky regions of Asia and Africa; as, Macaca maurus, the moor macaque of the East Indies. Note: Macaca mulatta is the Rhesus monkey, much used in biomedical research, and namesake of the Rh factor used in blood typing (due to discovery of that factor in the Rhesus monkey).
