Ōat, n.

n.; chiefly used in the plural. [A-S. ata, ate, ath, Fries. ôat.] 1. (Bot.) A plant of the genus Avena (A. sativa), and more usually the seed of the plant. 2. A pipe made from the straw of the oat. [Obs. and rare.] Milton.

Oat grass. (Bot.) (a.) A high grass (Danthonia spicata), common in sterile soils in the United States. (b.) A plant of the genus Arenatherium; grass of the Andes.