Capable of reproducing; fecund, fruitful.
Of land, etc.: capable of growing abundant crops; productive.
Of one's imagination, etc.: active, productive, prolific.
Capable of developing past the egg stage.
Not itself fissile, but able to be converted into a fissile material by irradiation in a reactor.
That procreates.
Of or pertaining to procreation; procreative.
One who, or that which, procreates.