Medical Dictionary


noun troph·ec·to·derm \ˌtrōf-ˈek-tə-ˌdərm\

Medical Definition of TROPHECTODERM

:  trophoblast; especially :  the outer layer of the mammalian blastocyst after differentiation of the ectoderm, mesoderm, and endoderm when the outer layer is continuous with the ectoderm of the embryo


How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears