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chorionic villus

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noun Embryology.
  1. one of the branching outgrowths of the chorion that, together with maternal tissue, form the placenta.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

chorionic villus in Medicine

chorionic villus

n.
  1. Any of the various fingerlike projections of the chorion of the embryo that contain fetal blood vessels and grow into the intervillous lacuna of the placenta.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.