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the science of life or living matter in all its forms and phenomena, especially with reference to origin, growth, reproduction, structure, and behavior.
the living organisms of a region:
the biology of Pennsylvania.
the biological phenomena characteristic of an organism or a group of organisms:
She is studying the biology of worms, especially in regard to their reproductive behavior.
the study of living organisms, including their structure, functioning, evolution, distribution, and interrelationships
the structure, functioning, etc, of a particular organism or group of organisms
the animal and plant life of a particular region

bi·ol’o·gist n.
The scientific study of life and of living organisms. Botany, zoology, and ecology are all branches of biology.


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