Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. infectĭo, ōnis, f. [2. in-factus], a non-performance of a thing, a doing nothing (late Lat.): fortunae (al. effectione), Eum. Pan. ad Const. Caes. 18, 6.
2. infectĭo, ōnis, f. [inficio], a dyeing (late Lat.): capillorum, Theod. Prisc. 1, 1: purpurae, Ambros. Apol. David, 8, § 45.