óṣṭha m. (etym. doubtful; √ uṣ, [Uṇ. ii, 4]) the lip (generally du.), [RV. ii, 39, 6]; [AV. x, 9, 14]; [xx, 127, 4]; [VS.]; [ŚBr.]; [Mn.] &c.
the forepart of an Agnikuṇḍa q.v., [Hcat.]
[cf. Zd. aoshtra; O. Pruss. austa, ‘mouth’; O. Slav. usta, ‘mouth’.]