Germinal

germinal [ JUR-muh'-nl ]
[ adjective ]

MEANING :
1. occurring in the earliest stage of development
2. relating to a germ or germs or germ cell

USAGE EXAMPLE 1 :
They were provided with a germinal concept and had to build a plan of action around it.

USAGE EXAMPLE 2 :
We surmise that cells of the adult forebrain germinal zone might be potential candidate cells to be transplanted for the replacement of non-renewable hair cells.