| Pronunciation: | | 'kowree`ân
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 WordNet Dictionary |
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| | Definition: | |
[n] outermost membranous sac enclosing the embryo in higher vertebrates (reptiles; birds; mammals) |
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CHORION is a 7 letter word that starts with C. |
| | See Also: | | chorionic villus, fetal membrane, sac |
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| Webster's 1913 Dictionary |
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| | Definition: | | \Cho"ri*on\, n. [NL., fr. Gr. ?.]
1. (Anat.)
(a) The outer membrane which invests the fetus in the
womb; also, the similar membrane investing many ova at
certain stages of development.
(b) The true skin, or cutis.
2. (Bot.) The outer membrane of seeds of plants.
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| Biology Dictionary |
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| | Definition: | | The chorion is the outermost membrane enclosing the fetus. It is formed from tissues on the outside of the embryo such as the trophoblast, and the part of it attached to the uterus wall eventually develops into the placenta. |
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| Glossary |
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| | Definition: | | a membrane derived from the amnion that lies just beneath the shell in the amniote egg and acts as a surface for oxygen absorption. |
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