trophectoderm
noun
troph·ec·to·derm
ˌtrōf-ˈek-tə-ˌdərm 
: 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
Cite this Entry
“Trophectoderm.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/trophectoderm. Accessed 22 May. 2025.
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