Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† smăragdus (in many MSS. written also zmăr-: smărăgdus, Mart. 5, 11, 1), i, comm. (m., Plin. 37, 5, 16, § 62; Luc. 10, 121; f., Mart. 4, 28, 4; Claud. VI. Cons. Hon. 563), = σμάραγδός, a transparent precious stone of a bright green color; including not only our emerald, but also the beryl, jasper, malachite, etc., Plin. 37, 5, 16, § 62; 37, 5, 18, § 73; Lucr. 2, 805; 4, 1126; Tib. 1, 1, 51; 2, 4, 27; Ov. M. 2, 24; Stat. Th. 2, 276 al.