From The Collaborative International Dictionary of English v.0.48 :
Entellus \En*tel"lus\, n. [NL., the specific name, fr. Gr. ? to
command.] (Zo["o]l.)
An East Indian long-tailed bearded monkey ({Semnopithecus
entellus) regarded as sacred by the natives. It is
remarkable for the caplike arrangement of the hair on the
head. Called also hoonoomaun and hungoor.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
entellus
n 1: langur of southern Asia; regarded as sacred in India [syn:
entellus, hanuman, Presbytes entellus, Semnopithecus
entellus]