syncytiotrophoblast
noun
syn·cy·tio·tro·pho·blast
sin-ˌsish-ē-ō-ˈtrō-fə-ˌblast 
: the outer syncytial layer of the trophoblast that actively invades the uterine wall forming the outermost fetal component of the placenta
called also syntrophoblast
compare cytotrophoblastCite this Entry
“Syncytiotrophoblast.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/syncytiotrophoblast. Accessed 7 May. 2025.
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