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
To provide outside context, Watters, the animal biology professor, reviewed photos and videos taken by Public Investigator.
—
Quinn Clark, jsonline.com, 27 Oct. 2025
Her sensitivities led her to the study of circadian rhythms, the twenty-four-hour cycles of activity and rest built into our biology.
—Rowan Jacobsen, Harpers Magazine, 24 Oct. 2025
While many of the researchers are focused on the biology, something that's never far from their mind is the psychological part of the equation.
—NPR, 24 Oct. 2025
Bald Knob Public Schools confirmed to the publication its social media post was about Dustin Cannon, who taught biology and science.
—Mike Stunson, Kansas City Star, 23 Oct. 2025
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Quinn Clark, jsonline.com, 27 Oct. 2025
Her sensitivities led her to the study of circadian rhythms, the twenty-four-hour cycles of activity and rest built into our biology.
—Rowan Jacobsen, Harpers Magazine, 24 Oct. 2025
While many of the researchers are focused on the biology, something that's never far from their mind is the psychological part of the equation.
—NPR, 24 Oct. 2025
Bald Knob Public Schools confirmed to the publication its social media post was about Dustin Cannon, who taught biology and science.
—Mike Stunson, Kansas City Star, 23 Oct. 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 29 Oct. 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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