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

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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 These findings, if confirmed, could explain the biological underpinnings behind why treating prenatal depression is so critical. — Catherine Demers, The Conversation, 16 Oct. 2026 Under Coventry, the most notable change came earlier this year, when the IOC explicitly banned biological males from women's sports. — Jackson Thompson Outkick, FOXNews.com, 16 Oct. 2026 But their emergence also underscores how much psychiatry still needs to learn about the biological underpinnings of depression and why patients respond differently to treatment. — Meghana Keshavan, STAT, 15 Oct. 2026 Finally, the team tested if this interface chemistry matters for biological molecules. — Jacek Krywko, ArsTechnica, 15 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

Shooting stars become visible when particles of the ancient comet collide with our planet's atmosphere at 147,600 miles per hour (237,539 kilometers per hour), vaporizing in a spectacular display of natural fireworks.

— Anthony Wood, Space.com, 17 Oct. 2026
This part of South America often gets heavy rain during El Niño, a natural climate phenomenon in which warmer-than-usual waters in the Pacific Ocean scramble weather patterns around the world.

— Arkansas Online, Arkansas Online, 17 Oct. 2026

Definition of natural

Adjective

If benefits shrink or get taxed more aggressively down the road (which is a legitimate concern) having a tax-free income source gives you flexibility a pre-tax account simply can’t.

— Jeanne Sahadi, CNN Money, 17 Oct. 2026
Blake Grupe has kicked for two NFL teams, but never for a legitimate contender.

— Gary Klein, Los Angeles Times, 17 Oct. 2026

Definition of legitimate

Browse Nearby Words

biography

biological

biopesticide

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“Biological.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/biological. Accessed 20 Oct. 2026.

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Synonyms of biological

adjective

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