proboscis monkey

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A large leaf-eating monkey (Nasalis larvatus) found only on Borneo, having an orange to pink face with a large protruding nose, especially in the male.

from The Century Dictionary.

• noun A semnopithecine ape, Nasalis larvatus; a kahau: so called from the elongated and flexible snout, which resembles the human nose in size and shape. See cut under Nasalis.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun Borneo monkey having a long bulbous nose