- cytotrophoblast
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cy·to·tro·pho·blast .sīt-ə-'trō-fə-.blast n the inner cellular layer of the trophoblast of an embryonic placental mammal that gives rise to the plasmodial syncytiotrophoblast covering the placental villi called also Langhans' layer, layer of Langhanscy·to·tro·pho·blas·tic -.trō-fə-'blas-tik adj* * *
n.the part of a trophoblast that retains its cellular structure and does not invade the maternal tissues. It forms the outer surface of the chorion.* * *
cy·to·tropho·blast (si″to-trofґo-blast) [cyto- + trophoblast] 1. the cellular (inner) layer of the trophoblast; called also Langhans layer. 2. cytotrophoblastic cell. cytotrophoblastic adj
Medical dictionary. 2011.