Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† stăsĭmum, i, n., = στάσιμον, that part of a poem which was sung standing, Mar. Vict. 2, p. 2522 P.
Stăsĭmus, i, m., the name of a slave, Plaut. Trin. 2, 4, 3 al.