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
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“Trophectoderm.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/trophectoderm. Accessed 31 Dec. 2024.
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