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Dictionary

troph•o•blast

Pronunciation: (trof'u-blast", trō'fu-), [key]
—n. Embryol.
the layer of extraembryonic ectoderm that chiefly nourishes the embryo or develops into fetal membranes with nutritive functions.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

tropho-

trophosome

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