Online Google Dictionary

chorion 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈkôrēˌän/,
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chorions, plural;
  1. The outermost membrane surrounding an embryo of a reptile, bird, or mammal. In mammals (including humans), it contributes to the formation of the placenta

  1. the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
  2. (chorionic) of or relating to a chorion; "a chorionic villus is a minute vascular projection on the fetal chorion"
  3. The chorion is one of the membranes that exist during pregnancy between the developing fetus and mother. It is formed by extraembryonic mesoderm and the two layers of trophoblast and surrounds the embryo and other membranes. ...
  4. Chorion Limited is a media company based in the United Kingdom and owned by Lord Waheed Alli. It possesses the rights to The Mr. Men Show and the literary works of Beatrix Potter, Enid Blyton, Raymond Chandler , Agatha Christie, and Georges Simenon. ...
  5. The protective and nutritive membrane that attaches higher vertebrate fetuses to the uterus; The outer case of an insect egg
  6. (Chorionic) Of the chorion, which is part of the placenta or after-birth. The term chorionic is justly applied to HCG, as this hormone is exclusively produced in the placenta, from where it enters the human mother’s blood and is later excreted in her urine.
  7. The two-layered structure formed from the trophoblast after implantation; secretes human chorionic gonadotropin.
  8. A thick and durable substance which surrounds and encloses the eggs of all species within the order Lepidoptera. With some eggs this substance is smooth whereas with others it is decorated with symmetrical art-like features. ...
  9. one of the four extraembryonic membranes of amniotes; it forms from the somatopleure (ectoderm and somatic mesoderm). In birds and reptiles, the membrane adheres to the shell and is highly vascularized to serve in gas exchange. ...
  10. The cellular, outermost extraembryonic membrane, composed of trophoblast lined with mesoderm. It develops villi about two weeks after fertilization. Villi are the threadlike projections growing in tufts on the external surface of the chorion. At three weeks, it is vascularized by allantoic vessels.
  11. The outer of the two membranes, or "sacs," surrounding the fetus. The inner membrane is the amnion.
  12. The outer membrane tissue of the primitive placenta.
  13. A tough, protective eggshell. In Drosophila and other terrestrial insects, it is specially designed for maximal gas exchange with minimal water loss. In fish, it is a clear, tough enveloping layer.
  14. The outermost extraembryonic membrane of reptiles, birds, and mammals. In eutherian mammals the chorion contributes to the formation of the placenta.
  15. membrane that develops around the fertilized embryo
  16. Outermost fetal membrane found around the amnion.
  17. the membrane covering a bee egg
  18. The outer casing of an egg.
  19. the eggshell of an insect.