biological
adjective
bi·o·log·i·cal
ˌbī-ə-ˈlä-ji-kəl 
variants
or less commonly biologic
1
: of or relating to biology or to life and living processes
2
: used in or produced by applied biology
3
: connected by direct genetic relationship rather than by adoption or marriage
her biological father
Examples of biological in a Sentence
the rights of the biological father in this case
Recent Examples on the Web
The same principles can be used by engineers to develop technical systems that are robust, efficient and adaptable – just like biological solutions often are.
—
Prabhat Ranjan Mishra, Interesting Engineering, 16 Feb. 2026
Jolie also shares three biological kids with Pitt – Shiloh, Vivienne and Knox.
—Lauryn Overhultz, FOXNews.com, 15 Feb. 2026
Last September, Navalnaya said her team had transferred some biological samples from his body abroad, and two laboratories confirmed he had been poisoned.
—Nandika Chatterjee, Time, 14 Feb. 2026
Much of the research on its biological underpinnings has focused on the gut microbiome, the dense microbial ecosystem in the digestive tract.
—New Atlas, 14 Feb. 2026
See All Example Sentences for biological
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Prabhat Ranjan Mishra, Interesting Engineering, 16 Feb. 2026
Jolie also shares three biological kids with Pitt – Shiloh, Vivienne and Knox.
—Lauryn Overhultz, FOXNews.com, 15 Feb. 2026
Last September, Navalnaya said her team had transferred some biological samples from his body abroad, and two laboratories confirmed he had been poisoned.
—Nandika Chatterjee, Time, 14 Feb. 2026
Much of the research on its biological underpinnings has focused on the gut microbiome, the dense microbial ecosystem in the digestive tract.
—New Atlas, 14 Feb. 2026
See All Example Sentences for biological
Cite this Entry
“Biological.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biological. Accessed 16 Feb. 2026.
Copy CitationMedical Definition
biological
adjective
variants
also biologic
1
: of or relating to biology or to life and living processes
2
: used in or produced by applied biology
3
: related by direct genetic relationship rather than by adoption or marriage
an adoptee who searched for years for her biological parents
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