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
One possibility is that GLP-1 drugs might be narrowing the gap between chronological age and biological age, the apparent age of various tissues.
—
Lori Youmshajekian, Scientific American, 8 June 2026
Livestock are vulnerable because of how they're handled, Lee Haines, an associate research professor of biological sciences at the University of Notre Dame, said in an email Thursday.
—CBS News, 8 June 2026
The new research suggests the biological reasons run deeper than the hormone itself.
—Allison Palmer, Fort Worth Star-Telegram, 8 June 2026
And calculating your biological age in itself is an emerging field, and experts warn that consumers should be cautious when buying such tests from companies.
—Ramishah Maruf, CNN Money, 7 June 2026
See All Example Sentences for biological
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Lori Youmshajekian, Scientific American, 8 June 2026
Livestock are vulnerable because of how they're handled, Lee Haines, an associate research professor of biological sciences at the University of Notre Dame, said in an email Thursday.
—CBS News, 8 June 2026
The new research suggests the biological reasons run deeper than the hormone itself.
—Allison Palmer, Fort Worth Star-Telegram, 8 June 2026
And calculating your biological age in itself is an emerging field, and experts warn that consumers should be cautious when buying such tests from companies.
—Ramishah Maruf, CNN Money, 7 June 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 10 Jun. 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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