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Any of the minute fingerlike projections of the fetal chorion that contain fetal blood vessels and that combine with maternal uterine tissue to form the placenta.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
one of the branching outgrowths of the chorion that together with maternal tissue form the placenta.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||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|
chorion - the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
villus - a minute hairlike projection on mucous membrane
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