vivipary

World English Dictionary
viviparous (vɪˈvɪpərəs)
 
adj
1.  oviparous Compare ovoviviparous (of animals) producing offspring that as embryos develop within and derive nourishment from the body of the female parent
2.  (of plants) producing bulbils or young plants instead of flowers
3.  (of seeds) germinating before separating from the parent plant
 
[C17: from Latin vīviparus, from vīvus alive + parere to bring forth]
 
viviparity
 
n
 
vi'vipary
 
n
 
vi'viparism
 
n
 
vi'viparousness
 
n
 
vi'viparously
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
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vivipary

retention and growth of the fertilized egg within the maternal body until the young animal, as a larva or newborn, is capable of independent existence. The growing embryo derives continuous nourishment from the mother, usually through a placenta or similar structure. This is the case in most mammals, many reptiles, and a few lower organisms. A more primitive condition, known as ovoviviparity and found in certain snakes, is the simple retention of the egg until it hatches. In this case the embryo derives food from the yolk present in the egg and is not dependent on the mother except for physical protection. Compare oviparity.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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