Capable of developing past the egg stage.
Of land, etc.: capable of growing abundant crops; productive.
Of one's imagination, etc.: active, productive, prolific.
Not itself fissile, but able to be converted into a fissile material by irradiation in a reactor.
Capable of reproducing; fecund, fruitful.
(of a mother) after giving birth
after being born, of or pertaining to the period immediately after birth