cālīgĭnōsus (post-class. cālīgōsus, Mart. Cap. 8, 803; cf. Kopp. ad id. 1, 67; Ven. Fort. Carm. 5, 4, 25), a, um, adj. [id.], full of mist, covered with mist, dark, obscure, gloomy (rare, but class. in prose and poetry): caelum et umidum et caliginosum, Cic. Tusc. 1, 19, 43: obscurior et quasi caliginosa stella (opp. illustris et pellucida), id. Div. 1, 57, 130: tractus, Plin. 17, 22, 35, 171: tenebrae, Val. Max. 1, 7, ext. 1.— II.Trop., dark, uncertain, obscure: nox, i. e. an uncertain future, Hor. C. 3, 29, 30: caliginosissima quaestio, Aug. Ep. 7.— Comp. and adv. not in use.