Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
germĭnātus, ūs, m. [germino], a sprouting forth, putting forth, germination (less freq. than germinatio): oleam, si capra depaverit primo germinatu, sterilescere, Plin. 15, 8, 8, § 34: serotino quaedam germinatu florent maturantque celeriter, id. 16, 25, 41, § 102.
germĭno, āvi, ātum, 1, v. n. and a. [germen] (post-Aug.).