Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
glăcĭālis, e, adj. [glacies], icy, frozen, full of ice (poet. and in post-Aug. prose; syn.: frigidus, algidus, gelidus, rigidus). hiems, Verg. A. 3, 285; Ov. M. 2, 30; cf. frigus, id. ib. 9, 582: polus, id. ib. 2, 173: Scythia, id. ib. 8, 790: regio (opp. perfervida), Col. 3, 1, 3: Oceanus, Juv. 2, 1; cf. pontus, Luc. 1, 18.