Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
extispex, ĭcis (also post-class. ‡ extispicus, i, Inscr. Orell. 2302), m. [exta-specio], one who prophesies by inspecting the entrails of animals, a diviner, soothsayer (syn.: augur, auspex, haruspex, hariolus, vates), Cic. Div. 2, 11, 26; 2, 18, 42; Varr. ap. Non. 16, 14.
Gen. plur.: extispicium, Att. ap. Non. 16, 11 (Rib. Trag. Rel. p. 190): extispicum, Poët. ap. Cic. Div. 1, 16, 29 (Trag. Rel. p. 247).