from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Formation of a placenta in the uterus.
  • noun The type or structure of a placenta.
  • noun Botany Arrangement of placentas within the ovary.

from The Century Dictionary.

  • noun In zoology: The attachment of the embryo or fetus to the uterus by means of a placenta; uterogestation.
  • noun The mode in which this attachment is effected; the manner of the disposition or construction of the placenta: as, deciduate or discoidal Placentation.
  • noun In botany, the disposition or arrangement of the placentas.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Anat.) The mode of formation of the placenta in different animals.
  • noun (Bot.) The mode in which the placenta is arranged or composed

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biology the local fusion of the embryonic stage of an animal to its parent for physiological exchange to promote the growth and development of the young; involves a placenta in non-egglaying mammals

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the formation of the placenta in the uterus
  • noun arrangement of the ovules in the placenta and of the placentas in the ovary


Sorry, no etymologies found.



Log in or sign up to get involved in the conversation. It's quick and easy.