Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
sandix (sandyx), [imacrbreve]cis (long, Prop. 2, 25 (3, 20), 45; short, Grat. Cyn. 86), f., = σάνδυξ (σάνδιξ), vermilion or a color like vermilion, Plin. 35, 6, 12, § 30; 35, 6, 23, § 40; 35, 6, 26, § 45; Verg. E. 4, 45; Prop. l. l.; Grat. l. l.; Vop. Aur. 29.