vireo, ui, ēre, v. n., to be green or verdant (syn. viridor). Lit.: alia semper virent, alia, hieme nudatā, verno tempore tepefacta frondescunt, Cic. Tusc. 5, 13, 37: fronde virere novā, Verg. A. 6, 206: quo viret uva jugo, Prop. 2, 34 (3, 32), 78: quod pubes hederā virente Gaudeat, Hor. C. 1, 25, 17: summa (montis) pinu, Ov. F. 5, 382: lucus, id. M. 14, 837: agellus, Hor. A. P. 117: stagna musco, Verg. G. 4, 18: circa ilicibus virentem Alburnum, id. ib. 3, 146: pectora felle, Ov. M. 2, 777: metalla Taygeti, of the green Spartan marble, Mart. 6, 42, 11; 9, 76, 9.

— Trop., to be fresh, vigorous, or lively; to flourish, bloom: vegetum ingenium vivido pectore vigebat, virebatque integris sensibus, Liv. 6, 22, 7; cf. Hor. C. 1, 9, 17: Chia, id. ib. 4, 13, 6: dum virent genua, id. Epod. 13, 4: aetas populi Romani viruit, Flor. 1, 22: ut novus serpens ... solet squamā virere recenti, Ov. M. 9, 267: virium gloriā virente florere, Just. 4, 4, 5.