Definition of


  1. (noun, animal) the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)

via WordNet, Princeton University

Alternate forms of Chorion

Derivations: chorionic

Hypernyms: sac

Origin of the word Chorion

  1. "outer membrane of the fetus," 1540s, from Gk. khorion "membrane enclosing the fetus, afterbirth," perhaps from PIE *ghere- "gut, entrail." more

via Online Etymology Dictionary, ©2001 Douglas Harper

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