biology
noun
bi·ol·o·gy
bī-ˈä-lə-jē 
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
The company claims that the birds flew preset routes and returned to base on command, marking an unusual step toward animal-machine hybrids that blur the line between biology and robotics.
—
Sujita Sinha, Interesting Engineering, 10 Feb. 2026
Weight gain is not a failure of willpower, it is driven by biology.
—Tara Comonte, Fortune, 9 Feb. 2026
Others suggest that borrowing strategies from biology may offer the most efficient path toward adaptable, resilient machines.
—New Atlas, 8 Feb. 2026
Another unregulated biology experiment that is underway is the unknown impact of per- and polyfluoroalkyl substances, or PFAS.
—Theodore J. Karamanski, Chicago Tribune, 6 Feb. 2026
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Sujita Sinha, Interesting Engineering, 10 Feb. 2026
Weight gain is not a failure of willpower, it is driven by biology.
—Tara Comonte, Fortune, 9 Feb. 2026
Others suggest that borrowing strategies from biology may offer the most efficient path toward adaptable, resilient machines.
—New Atlas, 8 Feb. 2026
Another unregulated biology experiment that is underway is the unknown impact of per- and polyfluoroalkyl substances, or PFAS.
—Theodore J. Karamanski, Chicago Tribune, 6 Feb. 2026
See All Example Sentences for biology
Cite this Entry
“Biology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biology. Accessed 15 Feb. 2026.
Copy CitationKids Definition
biology
noun
bi·ol·o·gy
bī-ˈäl-ə-jē
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
bi·ol·o·gy
-jē
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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