Emily Dickinson Lexicon

GROUSE, n. [grous; Pers. خُرُوسْ goros, gros, a cock.]

A heath-cock or cock of the wood, a fowl of the genus Tetrao. The name is given to several species, forming a particular division of the genus; such as the black game, the red game, the ptarmigan, the ruffed grouse, &c.