trophoblast
trop·hob·last
noun
1.
the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall
- “after implantation of the blastocyst in the uterine wall the trophoblast divides into two layers, the chorion and the placenta”
Origin
From tropho- + -blast.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.