Grison \Gri"son\, n. [F., fr. grison gray, gray-haired, gris
gray. See {Gris}.] (Zool.)
(a) A South American animal of the family Mustelidae
({Galictis vittata}). It is about two feet long,
exclusive of the tail. Its under parts are black. Also
called {South American glutton}.
(b) A South American monkey ({Lagothrix infumatus}), said to
be gluttonous.
[1913 Webster]