Gros Ventre (grō vänt′)
n. pl. Gros Ventre or Gros Ventres (vänt′)
a. A member of a Native American people formerly inhabiting the plains of northern Montana and southern Saskatchewan, with a present-day population in north central Montana.
b. The Algonquian language of the Atsina, dialectally related to Arapaho. Also called Atsina.
2. See Hidatsa.
[French, big belly : gros, big + ventre, belly (from an indigenous sign-language gesture designating this people that suggested a big belly).]
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