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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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n. - The vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus; That part of the ovary of a flowering plant where the ovules form.

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Usage examples (38)
  • Human term placenta a new abundant source of hematopoietic cells
  • Human term placenta a new abundant source of hematopoietic cells Peanuts, Anyone?
  • Flow of blood across the placenta from the mother to the fetus and from the fetus to the mother.
  • In addition, although cows "share" their blood with their unborn calves, the bovine placenta is a natural filter.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.