WordNet: chorion

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

• domain: topic mammal, mammalian

• hypernym sac

• part holonym amniote

• part holonym fetal membrane

chorion

• (englanti) chorionic (derivationally related)
• (suomi) alkion suonikalvo (synonyymi)

• (suomi) sikiön suonikalvo (synonyymi)