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
David MacMartin, a Westview science teacher who taught her honors and Advanced Placement biology, said most of Fan’s skills with the work were self-taught.
—
Jemma Stephenson, San Diego Union-Tribune, 23 Feb. 2026
But Held diverged from his academic background in conservation biology after speaking with a fellow prolific swimmer who found a post-pool career at Goldman Sachs.
—Emma Burleigh, Fortune, 22 Feb. 2026
The age of literacy made possible a set of abstract systems of thought—calculus, physics, advanced biology, quantum mechanics—that form the basis of all modern technology.
—Derek Thompson, The Atlantic, 22 Feb. 2026
Unlike trends that live purely in the beauty aisle, lymphatic drainage has its roots in biology.
—Avery Newmark, AJC.com, 20 Feb. 2026
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Jemma Stephenson, San Diego Union-Tribune, 23 Feb. 2026
But Held diverged from his academic background in conservation biology after speaking with a fellow prolific swimmer who found a post-pool career at Goldman Sachs.
—Emma Burleigh, Fortune, 22 Feb. 2026
The age of literacy made possible a set of abstract systems of thought—calculus, physics, advanced biology, quantum mechanics—that form the basis of all modern technology.
—Derek Thompson, The Atlantic, 22 Feb. 2026
Unlike trends that live purely in the beauty aisle, lymphatic drainage has its roots in biology.
—Avery Newmark, AJC.com, 20 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 24 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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