fertile

Of land, etc.: capable of growing abundant crops; productive.

Of one's imagination, etc.: active, productive, prolific.

Capable of reproducing; fecund, fruitful.

Most women at the age of fifty are not fertile.

Capable of developing past the egg stage.

Not itself fissile, but able to be converted into a fissile material by irradiation in a reactor.

There are two basic fertile materials: uranium-238 and thorium-232.

A city and township in Iowa.

A city in Minnesota.