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
Cloobeck then emphasized biology.
—
Richard Ramos, CBS News, 19 Nov. 2025
Professor Ivan Martin notes that while mouse studies have been invaluable, the new human model offers a closer approximation of human biology.
—Mrigakshi Dixit, Interesting Engineering, 19 Nov. 2025
Jacey Concannon, a senior biology major with a forensic science minor, was among those who grew emotional, as seen in the video played during Monday’s press conference.
—Amanda McCoy, Fort Worth Star-Telegram, 18 Nov. 2025
Pairing a business or STEM field like biology, engineering, or computer science with a liberal arts major, like English literature, history, or fine arts, enhances the likelihood of working in research and development activities as well as job match.
—Preston Fore, Fortune, 18 Nov. 2025
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Richard Ramos, CBS News, 19 Nov. 2025
Professor Ivan Martin notes that while mouse studies have been invaluable, the new human model offers a closer approximation of human biology.
—Mrigakshi Dixit, Interesting Engineering, 19 Nov. 2025
Jacey Concannon, a senior biology major with a forensic science minor, was among those who grew emotional, as seen in the video played during Monday’s press conference.
—Amanda McCoy, Fort Worth Star-Telegram, 18 Nov. 2025
Pairing a business or STEM field like biology, engineering, or computer science with a liberal arts major, like English literature, history, or fine arts, enhances the likelihood of working in research and development activities as well as job match.
—Preston Fore, Fortune, 18 Nov. 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 28 Nov. 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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