Main Entry: Pri·ma·tes

Pronunciation: \prī-ˈmā-ˌtēz\

Function: noun plural

: an order of eutherian mammals including humans, apes, monkeys, lemurs, and living and extinct related forms that are all thought to be derived from generalized arboreal ancestors and that are in general characterized by increasing perfection of binocular vision, specialization of the appendages for grasping, and enlargement and differentiation of the brain