Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ōcĭmum, i, n., = ὤκιμον, basil, Plin. 19, 7, 36, § 119; 20, 12, 48, § 119; Cels. 2, 20; Col. 10, 319; Pers. 4, 21.
† ōcĭnum (also ōcĭmum, ōcymum, and ōzymum), i, n., = ὤκινον, an herb which serves for fodder, perh. a sort of clover, Cato, R. R. 54; Varr. R. R. 1, 31; Plin. 17, 22, 35, § 198; 18, 16, 42, § 143.