Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
hīra, ae, f., the empty gut; called also intestinum jejunum, Gr. νῆστις, Macr. Somn. Scip. 1, 6 fin.; Plaut. Curc. 2, 1, 23; Arn. 7, 24.