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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.

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

They have already been detected in breast milk and in the placenta -- and even in the brain.

From Science Daily • Dec. 22, 2025

In an ectopic pregnancy, the placenta can’t safely grow, increasing the chances of maternal bleeding and fetal death, according to the release.

From Los Angeles Times • Dec. 12, 2025

Although scientists once believed that the placenta was a tight, impermeable barrier separating mother and child, that’s not true.

From The Wall Street Journal • Nov. 4, 2025

Her placenta had weakened and she’d had a cesarean, though not quickly enough.

From "Interpreter of Maladies" by Jhumpa Lahiri




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