viviparous

adjective

1. 1

   (of an animal or animal species) Being born alive, as are most mammals, some reptiles, and a few fish (as opposed to being laid as an egg and subsequently hatching, as do most birds and many other species).

2. 2

   (of a plant or plant species) Arising from an embryo that develops from the outset (rather than from a true seed that then germinates).