trophoblast

== English == === Etymology === From tropho- +‎ -blast. === Pronunciation === (UK) IPA(key): /ˈtɹɒfə(ʊ)blɑːst/ === Noun === trophoblast (plural trophoblasts) (cytology) The membrane of cells that forms the wall of a blastocyst during early pregnancy, providing nutrients to the embryo and later developing into part of the placenta. ==== Derived terms ==== cytotrophoblast syncytiotrophoblast trophoblastic