Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ăpŏdīxis, is, f., = ἀπόδειξις, a conclusive proof, demonstration, = evidens prebatio, Quint. 5, 10, 7; Petr. 132, 10; Gell. 17, 5, 5 (in Quint. 5, 10, 7 al., written as Greek).