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Answer for the clue "Outermost membranous sac enclosing the embryo in higher vertebrates (reptiles ", 7 letters:
chorion

Alternative clues for the word chorion

Word definitions for chorion in dictionaries

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"outer membrane of the fetus," 1540s, medical Latin, from Greek khorion "membrane enclosing the fetus, afterbirth," perhaps from PIE *ghere- "gut, entrail" (see yarn ).

Wiktionary Word definitions in Wiktionary
n. 1 (context anatomy biology English) The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus. 2 (context biology entomology English) The outer case of an insect egg. 3 (context botany English) The outer membrane ...

Wikipedia Word definitions in Wikipedia
Chorion Limited was an international media production company with offices in London, New York and Sydney. The company produced TV shows and feature films , and was best known for its portfolio of entertainment brands. These included children's characters ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Chorion \Cho"ri*on\, n. [NL., fr. Gr. ?.] (Anat.) The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development. The true skin, or cutis. (Bot.) The outer membrane of seeds of plants. ...

WordNet Word definitions in WordNet
n. outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)

Usage examples of chorion.

She had a chorion biopsy, and a fetoscopy, and an alpha-fetoprotein test, and amniocentesis.