Simpai \Sim"pai\, n.[Malay simpei.] (Zool.)
A long-tailed monkey ({Semnopitchecus melalophus}) native of
Sumatra. It has a crest of black hair. The forehead and
cheeks are fawn color, the upper parts tawny and red, the
under parts white. Called also {black-crested monkey}, and
{sinpae}.
[1913 Webster]