Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† hēmistĭchĭum, ĭi, n., = ἡμιστίχιον, a half-verse, hemistich: Enniano hemistichio usus est, Pseudo Ascon. Cic. Verr. 2, 1, 18.