placentation

American  

[plas-uhn-tey-shuhn] / ˌplæs ənˈteɪ ʃən /

noun

1. Anatomy, Zoology.

   1. the formation of a placenta.

   2. the manner of placement or construction of a placenta.

2. Botany. the disposition or arrangement of a placenta or placentas.

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placentation British  

/ ˌplæsɛnˈteɪʃən /

noun

1. botany the way in which ovules are attached in the ovary

2. zoology

   1. the way in which the placenta is attached in the uterus

   2. the process of formation of the placenta

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Etymology

Origin of placentation

From French, dating back to 1750–60; placenta, -ation

Example Sentences

The degree of placentation in a human is much, much higher than it is in other mammals.

From Salon

"Most of you probably realize that my point was to show that mammals are especially prone to invasive cancers because mammals evolved invasive placentation," he wrote, according to a tweet from Griswold.

From Fox News

An artificial womb has been created for a relative of the grey nurse shark, but sharks’ placentation and how they grow in the womb is a bit less complicated than in humans.

From Salon

Thus, in the case of marginal placentation the number must be limited by the narrow space from which they proceed, whereas in parietal and free central placentation the ovules are generally numerous.

From Project Gutenberg

There is only one of these that need be specially mentioned—the important fact, established by Selenka in 1890, that the distinctive human placentation is confined to the anthropoids.

From Project Gutenberg