hemoendothelial placenta

[ hē′mō-ĕn′dō-thēlē-əl ]

n.

A placenta in which the trophoblast becomes so attenuated that maternal blood is separated from fetal blood only by the endothelium of the chorionic capillaries.

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.