Online Google Dictionary

amnion 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈamnēˌän/,/-ən/,
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amnions, plural; amnia, plural;
  1. The innermost membrane that encloses the embryo of a mammal, bird, or reptile

  1. thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
  2. (amnionic) amniotic: of or related to the amnion or characterized by developing an amnion; "amniotic membrane"
  3. The amnion is a membrane building the amniotic sac that surrounds and protects an embryo. It is developed in reptiles, birds, and mammals, which are hence called “Amniota”; but not in amphibians and fish (Ichthyopsida), which are consequently termed “Anamniota”. ...
  4. The Amnion (singular, Amnioni) are a fictional alien species in Stephen R. Donaldson's The Gap Cycle. They are shown to be the only alien race humanity has made contact with and play a major role in the series from Forbidden Knowledge onwards.
  5. the innermost membrane of the fetal membranes of reptiles, birds, and mammals; the sac in which the embryo is suspended
  6. A thin, membranous, fluid-filled sac surrounding an embryo (as inside bird or reptile eggs, or in mammals) which keeps the embryo from drying out.
  7. thin membrane that surrounds the fetus before pregnancy and contains the amniotic fluid
  8. The membrane and cavity that encloses the developing embryo and fetus in fluid (essential for all vertebrates that reproduce out of the sea), cushioning the embryo and fetus from the effects of pressure. Unlike the chorion, contains cells that originate from the fetus itself.
  9. the avascular inner "shell" of the conceptus, embryologically continuous with the epithelium of the umbilical cord and the fetal skin. It forms the transparent membranous sac that is filled with amniotic fluid
  10. one of four embryonic membranes of vertebrate embryos; protects the embryo in a watery fluid
  11. Fluid-filled sac surrounding a developing embryo, characteristic of amniotes.
  12. the membrane that forms a sac around an embryo