1
: a branch of knowledge that deals with living organisms and vital processes
advances in the field of biology
a biology textbook
2
a
: the plant and animal life of a region or environment
the biology of the rainforest
b
: the life processes especially of an organism or group
the biology of cancer cells
broadly : ecology

Examples of biology in a Sentence

advances in the field of biology the biology of the rain forest the biology of tumor cells
Recent Examples on the Web
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.
Changing weather patterns also disrupt plant biology, deplete water infrastructure, and increase operating costs. Jonathan Destler, Fortune, 27 Aug. 2026 If regulators ultimately approve it, the treatment will be a triumph of immunology and cancer biology. STAT, 27 Aug. 2026 That biology has attracted A-list celebrities and biohackers faster than the science has caught up. Hanna Wickes, Kansas City Star, 26 Aug. 2026 The technology has crossed dangerous thresholds in biology, cybersecurity, white-collar work, and human relationships, Gates said in an interview with Semafor. Reed Albergotti, semafor.com, 26 Aug. 2026 See All Example Sentences for biology

Word History

Etymology

German Biologie, from bi- + -logie -logy

First Known Use

1799, in the meaning defined at sense 1

Time Traveler
The first known use of biology was in 1799

Browse Nearby Words

Cite this Entry

“Biology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biology. Accessed 1 Sep. 2026.

Kids Definition

biology

noun
1
: a branch of knowledge that deals with living organisms and life processes
2
a
: the plant and animal life of a region or environment
b
: the life processes of an organism or group
Etymology

from German Biologie "biology," derived from Greek bi-, bio- "life" and -logia "study, science"

Medical Definition

biology

noun
plural biologies
1
: a branch of science that deals with living organisms and vital processes
2
a
: the plant and animal life of a region or environment
b
: the laws and phenomena relating to an organism or group
3
: a treatise on biology
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