Oviparous and Viviparous

Oviparous

Oviparous animals are animals that lay eggs, with little or no other embryonic development within the mother.

oviparous adj : egg-laying [ant: {ovoviviparous}, {viviparous}]

Oviparous \O*vip"a*rous\, a. [L. oviparus; ovum egg + parere to bring forth: cf. F. ovipare.] (Physiol.) Producing young from eggs; as, an oviparous animal, in which the egg is generally separated from the animal, and hatched after exclusion; -- opposed to {viviparous}. [1913 Webster]

Viviparous

Vivipary has two different meanings. In animals, it means development of the embryo inside the body of the mother, eventually leading to live birth, as opposed to laying eggs.

viviparous adj : producing living young (not eggs) [ant: {oviparous}, {ovoviviparous}]

Viviparous \Vi*vip"a*rous\, a. [L. viviparus; vivus alive + parere to bear, bring forth. Cf. {Viper}.] (Biol.) Producing young in a living state, as most mammals, or as those plants the offspring of which are produced alive, either by bulbs instead of seeds, or by the seeds themselves germinating on the plant, instead of falling, as they usually do; -- opposed to {oviparous}. [1913 Webster] {Viviparous fish}. (Zo["o]l.) See {Embiotocoid}. {Viviparous shell} (Zo["o]l.), any one of numerous species of operculated fresh-water gastropods belonging to {Viviparus}, {Melantho}, and allied genera. Their young, when born, have a well-developed spiral shell. [1913 Webster]

Data Sources:

  • oviparous: WordNet (r) 2.0
  • oviparous: The Collaborative International Dictionary of English v.0.44
  • viviparous: WordNet (r) 2.0
  • viviparous: The Collaborative International Dictionary of English v.0.44

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