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
In radiation biology, this would mean that small exposures might activate repair mechanisms or adaptive responses that reduce the likelihood of disease, rather than increasing it.
—
Anna Broughel, Forbes.com, 7 Sep. 2025
The team, led by Keith Sockman, an associate professor of biology at the University of North Carolina at Chapel Hill, conducted its research in Molas Pass, Colorado.
—Maria Mocerino, Interesting Engineering, 7 Sep. 2025
Hisahito is a university freshman who loves bugs A freshman at Tsukuba University near Tokyo, Hisahito studies biology and enjoys playing badminton.
—Mari Yamaguchi, Twin Cities, 6 Sep. 2025
Advertisement Geier, whose highest credential is a bachelor’s degree in biology, has built his career attempting to show a link between vaccines and autism.
—Dominique Mosbergen, Time, 5 Sep. 2025
See All Example Sentences for biology
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Anna Broughel, Forbes.com, 7 Sep. 2025
The team, led by Keith Sockman, an associate professor of biology at the University of North Carolina at Chapel Hill, conducted its research in Molas Pass, Colorado.
—Maria Mocerino, Interesting Engineering, 7 Sep. 2025
Hisahito is a university freshman who loves bugs A freshman at Tsukuba University near Tokyo, Hisahito studies biology and enjoys playing badminton.
—Mari Yamaguchi, Twin Cities, 6 Sep. 2025
Advertisement Geier, whose highest credential is a bachelor’s degree in biology, has built his career attempting to show a link between vaccines and autism.
—Dominique Mosbergen, Time, 5 Sep. 2025
See All Example Sentences for biology
Cite this Entry
“Biology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biology. Accessed 11 Sep. 2025.
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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