Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† măgĭcus, a, um, adj., = μαγικός, of or belonging to magic, magic, magical (poet. and in post-Aug. prose): artes, Verg. A. 4, 493: magicis auxiliis uti, Tib. 1, 8, 24: arma movere, Ov. M. 5, 197: superstitiones, Tac. A. 12, 59: vanitates, Plin. 30, 1, 1, § 1: herbae, id. 24, 17, 99, § 156: aquae, Prop. 4, 1, 102 (5, 1, 106): di magici, that were invoked by incantations (as Pluto, Hecate, Proserpine), Tib. 1, 2, 62; Luc. 6, 577: linguae, i. e. hieroglyphics, id. 3, 222; but lingua, skilled in incantations, Ov. M. 7, 330; Luc. 3, 224: cantus, Juv. 6, 610: magicae resonant ubi Memnone chordae, mysterious, id. 15, 5.