Definition of trophoblast in English:

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trophoblast

Pronunciation: /ˈtrɒfə(ʊ)blast/
Pronunciation: /ˈtrəʊfə(ʊ)blast/

noun

Embryology
A layer of tissue on the outside of a mammalian blastula, supplying the embryo with nourishment and later forming the major part of the placenta.
Example sentences
  • The trophoblast eventually forms the placenta, through which the embryo proper receives dissolved nutrients and is cleansed of waste.
  • When the developing, fertilized egg at the ‘blastocyst’ stage becomes implanted in the lining of the uterus, it develops ‘villi’ - fine, frond-like cellular projections from its outermost layer, the trophoblast.
  • The placenta derives from embryonic cells called trophoblasts, which form a ball around the cells that ultimately develop into the fetus.

Derivatives

trophoblastic

adjective
Example sentences
  • Multiple gestation, gestational trophoblastic disease, triploidy, trisomy 21 syndrome, and hydrops fetalis have been associated with an increased incidence of hyperemesis gravidarum.
  • Nevertheless, one version of this suggestion, the ovarian time bomb hypothesis, explicitly envisages an individual-level cost of parthenogenesis, namely ovarian trophoblastic disease.
  • The vascular endothelium was destroyed by villous proliferation and trophoblastic invasion in this vessel.

For editors and proofreaders

Line breaks: tropho|blast

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