Medical Dictionary


noun tro·pho·blast \ˈtrō-fə-ˌblast\

Medical Definition of TROPHOBLAST

:  the outer layer of the mammalian blastocyst that supplies nutrition to the embryo, facilitates implantation by eroding away the tissues of the uterus with which it comes in contact allowing the blastocyst to sink into the cavity formed in the uterine wall, and differentiates into the extraembryonic membranes surrounding the embryo—called also trophoderm
tro·pho·blas·tic \ˌtrō-fə-ˈblas-tik\ adjective


May 23, 2015
debouch Hear it
to emerge or cause to emerge
Take a 3-minute break and test your skills!
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