viviparity


viviparity

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      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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Universalium. 2010.

Look at other dictionaries:

  • Viviparity — Viv i*par i*ty, n. (Biol.) The quality or condition of being viviparous. H. Spencer. [1913 Webster] …   The Collaborative International Dictionary of English

  • viviparity — viviparity. См. вивипария. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • viviparity — viviparity. См. живорождение. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • viviparity — viviparous ► ADJECTIVE 1) (of an animal) bringing forth live young which have developed inside th body of the parent. Compare with OVIPAROUS(Cf. ↑oviparous). 2) (of a plant) reproducing from buds which form plantlets while still attached to the… …   English terms dictionary

  • viviparity — noun Date: 1864 the quality or state of being viviparous …   New Collegiate Dictionary

  • viviparity — the condition of giving birth to active, free swimming young …   Dictionary of ichthyology

  • viviparity — noun The condition of being viviparous …   Wiktionary

  • viviparity — The quality or state of being viviparous, i.e., producing offspring that are living at the time of birth. SYN: zoogony. * * * vi·vi·par·i·ty .vī və par ət ē, .viv ə n, pl ties the quality or state of being viviparous * * * vivi·par·i·ty… …   Medical dictionary

  • viviparity — n. condition of giving birth to living young rather than laying eggs; condition of having seeds that germinate while still attached to the main plant …   English contemporary dictionary

  • viviparity — vivi·par·i·ty …   English syllables


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