BIOLOGICAL Synonyms: 8 Similar and Opposite Words

biological

adjective

ˌbī-ə-ˈlä-ji-kəl

variants also biologic

Definition of biological

as in birth

being such by blood and not by adoption or marriage the rights of the biological father in this case

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of biological Why seasons change affects your mood As daylight hours decrease in fall and winter, changes in light exposure disrupt circadian rhythms, the internal biological processes that regulate sleep, alertness and mood. — Hanna Wickes, Fort Worth Star-Telegram, 23 Oct. 2026 Nieder’s leading explanation is that nearly every biological process runs faster in birds than in mammals. — Jacek Krywko, ArsTechnica, 23 Oct. 2026 What’s Happening Shorter days are already disrupting circadian rhythms, the internal biological processes that regulate sleep, alertness and mood. — Hanna Wickes, Miami Herald, 23 Oct. 2026 The agents analyze clinical data, genomics, biological specimen data, and competition from other developers. — Katherine MacPhail, STAT, 23 Oct. 2026 See All Example Sentences for biological

Recent Examples of Synonyms for biological

Adjective

When the latter has a post-birth panic about surrendering her child, Irina simply absconds with it from the private hospital facility in the middle of the night, knowing the destitute young woman is unlikely to pursue any legal or other options.

— Dennis Harvey, Variety, 30 July 2026
The infant and his mother were then transported to a hospital for post-birth medical care, with both expected to make a full recovery.

— Latoya Gayle, PEOPLE, 3 July 2026

Definition of birth

Adjective

This would've already been an abnormal natural hot spell on top of a huge amount of climate change, Barnes said.

— Arkansas Online, Arkansas Online, 24 Oct. 2026
After 100,000 years, radiation levels will decay back to those of natural uranium ore.

— Mrigakshi Dixit, Interesting Engineering, 23 Oct. 2026

Definition of natural

Adjective

However, don't randomly disable legitimate Android system components because their technical names look strange.

— Kurt Knutsson, FOXNews.com, 23 Oct. 2026
At 100 percent on Rotten Tomatoes as of release day, Possible Love has reached a level of acclaim that places Jeon into legitimate Oscar contention — another first for her.

— David Canfield, HollywoodReporter, 23 Oct. 2026

Definition of legitimate

Browse Nearby Words

biography

biological

biopesticide

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Style

“Biological.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/biological. Accessed 28 Oct. 2026.

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Synonyms of biological

adjective

Example Sentences

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