Source : Webster's Revised Unabridged Dictionary (1913)

Upsarokas \Up`sar*o"kas\, n. pl. (Ethnol.)
   See {Crows}.

Crows \Crows\ (kr?z), n. pl.; sing. {Crow}. (Ethnol.)
   A tribe of Indians of the Dakota stock, living in Montana; --
   also called {Upsarokas}.