I.a basin, a tub for bathing; a vat for treading out grapes: “labrum si in balineo non est,” Cic. Fam. 14, 20: “marmoreo labro aqua exundat,” Plin. Ep. 5, 6, 20: “splendentia,” Verg. A. 12, 417: “aëna,” id. ib. 8, 22: “marmorea duo labra ante fornicem posuit,” Liv. 37, 3, 7: “unda labris nitentibus instat,” Stat. S. 1, 5, 49: “eluacrum,” Cato, R. R. 11: “lupinarium,” id. ib.: “olearium,” id. ib. 13; Col. 12, 50, 10 sq.; cf.: spumat plenis vindemia labris, in the full vats or vessels, Verg. G. 2, 6; “of a tub or basin for bathing,” Vitr. 5, 10, 4; “of a fountain,” Dig. 19, 1, 15.—
II. Poet. transf., a bath: “nec Dryades, nec nos videamus labra Dianae,” Ov. F. 4, 761; cf. id. Ib. 481; id. H. 21, 178.