Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. gĕnĭtus, a, um, Part., from gigno.
2. gĕnĭtus, ūs, m. [gigno], a begetting, bearing, generation (post-class. and very rare): libri de animalium genitu, App. Mag. p. 297 sq.