Lewis & Short

Sīrĭus, ii, m., = σείριος, the dog-star, Sirius, Hyg. Astr. 3, 34; 2, 35; Verg. G. 4, 425; id. A. 3, 141; Tib. 1, 7, 21; Luc. 10, 211 al.
Adj.: ardor, of Sirius, Verg. A. 10, 273; Col. poët. 10, 289: vapor, Prud. Cath. 12, 22.