I. Of six months, half-yearly, semi-annual: dies, nox, lasting six months (far in the north), Varr. R. R. 1, 2, 5: “regnum,” Cic. Att. 10, 8, 7: “imperium,” Caes. B. C. 1, 9: “dux,” Liv. 21, 43, 15: “consulatus,” Suet. Ner. 14: “tribunatus (militaris),” Plin. Ep. 4, 4, 2; hence also, aurum, the ring of the tribunes (worn for six months): “semestri vatum digitos circumligat auro,” Juv. 7, 89; cf. “also, consilia,” Suet. Aug. 35: “spatium,” Plin. 18, 29, 69, § 280: “filius,” six months old, id. 11, 51, 112, § 270; so, “leones,” id. 8, 16, 17, § 45; cf. “vita,” id. 8, 39, 60, § 141: “aves, hirundines,” id. 10, 25, 36, § 73.—
sēmestris , e, adj. sex-mensis.