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.
© Webster 1913.