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Từ điển WordNet v3.1 - WordNet Dictionary
trophoblast
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
• Derivationally related forms:
trophoblastic
• Hypernyms:
membrane, tissue layer
• Part Holonyms:
blastula, blastosphere
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