Lewis & Short

ē-gĕlĭdus, a, um, adj.

  1. I. (Ex priv. as in effrenare.) Not cold; lukewarm, tepid (poet. and in post-Aug. prose): potio et frigidae propior, Cels. 4, 18 fin.; cf. aqua (opp. frigida), id. 6, 18; cf. Suet. Aug. 82: tepores, Cat. 46, 1; cf. ver (with mollissimus annus), Col. poët. 10, 282: hiemes, Aus. Ep. 24, 97: Notus (opp. gelidus Boreas), Ov. Am. 2, 11, 10: Mosella, Aus. Ep. 2, 4.
  2. * II. (Ex intensive, as in edurus, efferus, etc.) Chilly, chill, cold: flumen, Verg. A. 8, 610; Forbig. ad loc. (Rib. ecgelido): Hister, Aus. Caes. 21, 1: aquae, Plin. 31, 2, 6, § 10: exhalatio, App. de Mundo, 8.