Entry 1 sense Webster, 1913 Angwantibo · An·gwan·ti·bo · IPA /æŋˈɡwɑntɪˌbou/ 01 n. A small lemuroid mammal (Arctocebus Calabarensis) of Africa. It has only a rudimentary tail. 1. A small lemuroid mammal (Arctocebus Calabarensis) of Africa. It has only a rudimentary tail.(Zool.)