A pair of colobus monkeys.
colobus definition by Webster's New World
Webster\'s New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a genus (Colobus) of thumbless, long-haired, black and white African monkeys
Origin of colobusModern Latin ; from Classical Greek kolobos, curtailed, docked (akin to kolos, maimed: for Indo-European base see holt): probably so named because of the absent or rudimentary thumbs