Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ischĭa, ōrum, n., = ἰσχία, the hipjoints, the hips (Lat. coxae), Gell. 4, 13, 1; Cael. Aur. Tard. 5, 1, 1.