Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† stĭbĭum, ii, n.; also called stĭbi, is, and stimmi = στίβι, στιμμι, antimony, a sulphuret of antimony, stibium, used by women, in the form of powder, to color their eyebrows and eyelashes black; and in medicine, as an eye-salve, Plin. 33, 6, 33, § 101; 29, 6, 37, § 115; Cels. 6, 6, 6; 6, 6, 8; 6, 6, 12 sq.; Scrib. Comp. 27; 34 al.; Vulg. 4 Reg. 9, 30.