Noun: trophoblast 'trow-fu,blãst or 'tró-fu,blãst
- 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"
Derived forms: trophoblasts
Type of: membrane, tissue layer
Part of: blastosphere, blastula
Encyclopedia: Trophoblast