The Collaborative International Dictionary
Tetraonid
Tetraonid \Te*tra"o*nid\, n. [L. tetrao a heath cock, grouse, Gr. ?: cf. F. t['e]traonide.] (Zo["o]l.) A bird belonging to the tribe of which the genus Tetrao is the type, as the grouse, partridge, quail, and the like. Used also adjectively.
Wiktionary
tetraonid
n. (context zoology English) A bird belonging to the tribe of which the genus ''Tetrao'' is the type.