Definitions

fetus

[fee-tuhs] / ˈfi təs /

NOUN

unborn young

Synonyms

STRONG

blastosphere blastula embryo

WEAK

developing infant fertilized egg

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.

Scientists have shown that this ratio reflects the balance of estrogen and testosterone a fetus is exposed to during the first trimester of pregnancy.

From Science Daily • Feb. 10, 2026

Conversely, maternal cells circulating in the pregnant mother’s bloodstream commonly slip through into the fetus and get incorporated into its body.

From The Wall Street Journal • Nov. 4, 2025

Fevers can harm the fetus and have been associated with autism and ADHD.

From The Wall Street Journal • Oct. 29, 2025

The medical consensus is that it should only be used to battle high fevers that can be dangerous for both the mother and the developing fetus.

From Salon • Sep. 22, 2025

How were these gemmular instructions from a father and a mother applied to a developing fetus?

From "The Gene" by Siddhartha Mukherjee

Vocabulary lists containing fetus

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