Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Mătĭus, a,
- I. the name of a Roman gens. So, Cn. Matius, a poet and translator of the Iliad, Gell. 6, 6, 5; 9, 14, 14; Varr. L. L. 7, 5, § 96 Müll.; perh. the same with C. Matius, a friend of Cæsar and Cicero, Cic. Fam. 6, 12, 2; 7, 15; 11, 28; Plin. 12, 2, 6, § 13; Col. 12, 4, 2 al.
Hence,
- II. Mătĭā-nus, a, um, adj., of or belonging to a Matius, Matian: mala, a kind of apple, Col. 5, 10, 19; 12, 47, 5; Suet. Dom. 21: poma, Front. de Fer. Als. 3; Minutal, Apic. 4, 3.