from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun one of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta
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