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

biologist

bī-ˈä-lə-jist 

noun

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

Why the timing of light matters Human biology is closely connected to the natural cycle of light and darkness. — Ascend Agency, New York Daily News, 11 Sep. 2026

The whole thing plays like something concocted by an 8th grader sitting in the back of biology class and doodling movie ideas in his notebook, offering more proof that Besson has never quite risen above the juvenile tendencies of his early years. — Jordan Mintzer, HollywoodReporter, 11 Sep. 2026

In addition to data on coiling direction from multiple species going back millions of years, the study incorporates insights from modern foram genetics and biology. — Quanta Magazine, 11 Sep. 2026

Our work also reveals an unexpected connection between biology and artificial intelligence. — Shiladitya Banerjee, The Conversation, 10 Sep. 2026

Word History

Etymology

German Biologie, from bi- + -logie -logy

First Known Use

1799, in the meaning defined at sense 1

Phrases Containing biology

• cell biology
• developmental biology
• evolutionary biology
• evolutionary developmental biology
• molecular biology

Rhymes for biology

• ology
• aetiology
• anthropology
• archaeology
• archeology
• audiology
• cardiology
• climatology
• cohomology
• cosmetology
• criminology
• demonology

Kids 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

biologist

-jəst 

noun

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