solstĭtĭālis, e, adj. [solstitium].
I Lit., of or belonging to the summer solstice , solstitial (opp. brumalis): (sol) Brumales adeat flexus, atque inde revortens Cancri se ut vortat metas ad solstitiales, Lucr. 5, 617: dies, the day on which the sun enters Cancer , the longest day , Cic. Tusc. 1, 39, 94: tempus, Ov. F. 6, 790; Vitr. 9, 5: nox, i. e. the shortest , Ov. P. 2, 4, 26: ortus sideris, Just. 13, 7, 10: circulus, the tropic of Cancer , Varr. L. L. 9, § 24 Müll.; Plin. 2, 11, 8, § 50.—Called also orbis, Cic. N. D. 3, 14, 37: exortus, the point where the sun rises at the summer solstice , Plin. 18, 34, 77, § 333.—
II Transf.
A Of or belonging to midsummer or summer heat : herba, i. e. a summer plant or one that quickly withers , Plaut. Ps. 1, 1, 36; Aus. Prof. 6, 35; Plin. 26, 5, 14, § 26: spinae, Col. 2, 17, 1: acini, Plin. 14, 16, 18, § 99: tempus, Liv. 35, 49 Drak.: caput Leonis, Luc. 6, 338: morbus, the midsummer fever , Plaut. Trin. 2, 4, 143.—
B Of or belonging to the sun , solar (for solaris): annus, qui solstitiali circumagitur orbe, in a solar revolution , Liv. 1, 19, 6; for which, annus, Serv. A. 4, 653: plaga, i. e. the south , Sol. 25.