noun 1. a tall North American grass (Andropogon gerardii syn. A. furcatus) that has smooth bluish leaf sheaths and slender spikes borne in pairs or clusters, is a dominant grass of the originally tallgrass prairies, and is used for hay and forage — called also big bluestem — compare sand bluestem 2. little bluestem

Энциклопедический словарь Мерриама-Вебстера