| NOUN | animal | chorion | the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals) |
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| Meaning | The outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals). | |
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| Category | mammal, mammalian | Any warm-blooded vertebrate having the skin more or less covered with hair |
| Part of | amniote | Any member of the Amniota |
| fetal membrane | Any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus | |
| Parts | chorionic villus | One of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta |
| Broader | sac | A structure resembling a bag in an animal |
| Spanish | corion | |
| Catalan | cori, còrion | |
| Adjectives | chorionic | of or relating to a chorion |
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