any leaf-eating arboreal Old World monkey of the genus Colobus, of W and central Africa, having a slender body, long silky fur, long tail, and reduced or absent thumbs
Word origin
C19: New Latin, from Greek kolobos cut short; referring to its thumb
colobus in American English
(ˈkɑləbəs)
noun
any of a genus (Colobus) of thumbless, long-haired, black and white African monkeys
Word origin
ModL < Gr kolobos, curtailed, docked (akin to kolos, maimed: for IE base see holt): prob. so named because of the absent or rudimentary thumbs