1: the arrangement of placentas and ovules in a plant ovary
2a: the development of the placenta and attachment of the fetus to the uterus during pregnancy
b: the morphological type of a placenta
Examples of placentation in a Sentence
Recent Examples on the WebAnother possible cause for higher hormone levels leading to excessive nausea is something called abnormal placentation, where the placenta overgrows, says Liu, adding that this happens only occasionally.
Miriam Falco And Alanne Orjoux, CNN, 4 Sep. 2017
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'placentation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.