germinal

adjective5

1. •
   Pertaining, similar, or belonging to a germ.
2. •
   (figurative) Serving as a point of origin; formative.

   • My upbringing was the germinal idea behind the opera.
3. •
   (figurative) Highly influential; seminal.

   • This case was germinal to development of the theory of joint participation.
4. •
   Relating to a plant ovary.
5. •
   Relating to spring