viviparity


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to viviparity: territoriality, ovoviviparity

vi·vip·a·rous

 (vī-vĭp′ər-əs, vĭ-)
adj.
1. Zoology Giving birth to living offspring that develop within the mother's body. Most mammals and some other animals are viviparous.
2. Botany
a. Germinating or producing seeds that germinate before becoming detached from the parent plant, as in the mangrove.
b. Producing bulbils or new plants rather than seed, as in the tiger lily.

[From Latin vīviparus : vīvus, alive; see gwei- in Indo-European roots + -parus, -parous.]

vi′vi·par′i·ty (vī′və-păr′ĭ-tē, vĭv′ə-) n.
vi·vip′a·rous·ly adv.
Translations
viviparità
References in periodicals archive ?
The evolution of viviparity in amniote vertebrates: egg retention versus egg size reduction.
Some immunological and endocrineological problems raised by the evolution of viviparity in vertebrates.
25) A series of knockout mouse studies on these genes has gathered persuasive evidence that at least some of these genes are essential in the current form of the developmental and reproductive systems, which suggests that they made critical contributions to mammalian evolution in a variety of ways, such as the establishment of viviparity (22-26) and presumably certain sophisticated brain functions.
This genus inhabits mainly lowland forests and evolved with a group of specializations related to viviparity, which are unique among reptiles and convergent only with placental mammals: a long period of gestation (9 to 12 months) and microlecithal eggs (0.
The down-side of viviparity is that parent trees must 'invest' a great deal more energy in producing fewer numbers of developed seedlings.
Convergent evolution of viviparity, matrotrophy, and specializations for fetal nutrition in reptiles and other vertebrates.
Because the remaining eggs are unincubated, this condition has been classified as simultaneous viviparity (Meier et al.
Live bearing in Cretaceous marine lizards: first fossil record of viviparity in squamates.
In Reproductive biology and phylogeny of fishes (agnathans and bony fishes): phylogeny, reproductive system, viviparity, spermatozoa.
Researchers from the University of Exeter and the University of Lincoln investigated the hypotheses that historical invasions of cold climates by Liolaemus lizards - one of the most diverse groups of vertebrates on earth - have only been possible due to their evolution to viviparity (live birth) from oviparity (laying eggs).
The difference in diets between males and females may be related to the viviparous reproductive strategy (matrotrophic viviparity with trophonemata) used by freshwater stingrays (Charvet-Almeida et al.