Producing young in a living state, as all mammifers; as distinguished from oviparous, producing eggs, as fowls. If fowls were viviparous, it is difficult to how the female would fly during preganancy.

In botany, producing its offspring alive, either by bulbs instead of seeds, or by the seeds themselves germinating on the plant, instread of falling, as they usually do; as a viviparous plant.