simian (adj.)

"characteristic of monkeys or apes," c. 1600, from Latin simia "ape," from simus "snub-nosed," from Greek simos "snub-nosed" (like the Scythians), also a masculine proper name, of unknown origin. Biological meaning "pertaining to monkeys" is from 1863. The noun meaning "an ape or monkey" first is attested in 1880.