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Definitions

placenta

[pluh-sen-tuh] / pləˈsɛn tə /


NOUN
membrane
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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All newborns lack vitamin K. No matter how much vitamin K a mother consumes, it doesn’t sufficiently pass through the placenta, and breast milk contains only small amounts.

From Salon May 7, 2026

Baby Alissa suffered severe brain damage due to a lack of oxygen caused by the placenta coming away from the womb wall.

From BBC Mar. 19, 2026

Previous research has detected microplastics in nearly every organ, as well as in bodily fluids and even the placenta.

From Science Daily Feb. 25, 2026

Late in her third trimester, doctors diagnosed her with placenta accreta, a potentially life-threatening condition in which the placenta grows too far into the wall of the uterus.

From The Wall Street Journal Dec. 28, 2025

He detected no respiratory infection but prescribed shots of liver and placenta extract, a novel therapy for weakened immune systems.

From "Big Science" by Michael Hiltzik

One point makes the above view more probable in Acropera than in other cases, viz. the presence of rudimentary placentae or testae, for I cannot hear that these have been observed in the male plants.

From More Letters of Charles Darwin — Volume 2 by Darwin, Francis, Sir

As I traced the placentae upwards, the ovules appeared, becoming gradually more abundant towards its apex.

From More Letters of Charles Darwin — Volume 2 by Darwin, Francis, Sir

Two placentae were expelled some time after the twins, and showed a membranous junction.

From Anomalies and Curiosities of Medicine by Pyle, Walter L. (Walter Lytle)

Yet when I call to mind the state of the placentae in A. luteola, I am astonished that they should produce ovules.

From More Letters of Charles Darwin — Volume 2 by Darwin, Francis, Sir

In making longitudinal sections of the fertilised ovary before mentioned, I found the basal portion entirely destitute of ovules, their place being substituted by transparent cellular ramification of the placentae.

From More Letters of Charles Darwin — Volume 2 by Darwin, Francis, Sir

She was carrying an unknown number of human placentas in a plastic bag when she was picked up, according to the police.

From BBC Sep. 19, 2025

The examples included an NPR story on eating human placentas, a practice that has been around for decades, and a 2017 documentary about a transgender teen on PBS.

From Los Angeles Times May 2, 2025

Yes, even though your own placenta did not live very long, placentas, as a group, are some of the real stars of life on Earth today.

From Slate Sep. 7, 2024

While the advanced pathology residents were working on cancer, Kliman said newer residents started in the basement morgue performing autopsies on placentas and fetuses.

From Salon May 29, 2024

In 2006, some seven hundred new mothers found out that doctors had taken their placentas without consent to test for abnormalities that might help the hospital defend itself against future lawsuits over birth defects.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot




Vocabulary lists containing placenta


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