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C______
Definitions
the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
Word origin
From Late Latin chorion, from Ancient Greek χόριον (khórion, “membrane surrounding the fetus, afterbirth”).
Used in a sentence
“The amnion and chorion begin to develop soon after fertilization and continue to grow until about 28 weeks′ gestation.”
“The chorion has a predominantly lamellar structure, the lamellae being two-dimensional networks of protein fibrils.”
“Even closely related species may have chorions differing in thickness. In the silkmoths, for example, the chorion of Bombyx is about 25 μm thick while that of Hyalophora is 55 μm thick.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
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