trophoblast

Definitions of trophoblast
  1. noun
    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”
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    type of:
    membrane, tissue layer
    a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
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