bi·ol·o·gy

[bahy-ol-uh-jee]
noun
1.
the science of life or living matter in all its forms and phenomena, especially with reference to origin, growth, reproduction, structure, and behavior.
2.
the living organisms of a region: the biology of Pennsylvania.
3.
the biological phenomena characteristic of an organism or a group of organisms: the biology of a worm.

Origin:
1805–15; < German Biologie. See bio-, -logy

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Collins
World English Dictionary
biology (baɪˈɒlədʒɪ) [Click for IPA pronunciation guide]
 
n
1.  the study of living organisms, including their structure, functioning, evolution, distribution, and interrelationships
2.  the structure, functioning, etc, of a particular organism or group of organisms
3.  the animal and plant life of a particular region
 
bi'ologist
 
n

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00:10
Biology is a TOEFL word you need to know.
So is respiration. Does it mean:
the chemical reaction that breaks down nutrient molecules in living cells to release energy. Food oxygen - energy water carbon dioxide
angry and annoyed; ill-humored
Etymonline
Word Origin & History

biology
1819, from Ger., from Gk. bios "life" (see bio-) + logia "study of." Suggested 1802 by German naturalist G. Reinhold Treviranus and introduced as a scientific term that year in French by Lamarck.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

biology bi·ol·o·gy (bī-ŏl'ə-jē)
n.

  1. The science of life and of living organisms, including their structure, function, growth, origin, evolution, and distribution. It includes botany and zoology.

  2. The life processes or characteristic phenomena of a group or category of living organisms.


bi·ol'o·gist n.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
biology   (bī-ŏl'ə-jē)  Pronunciation Key 
The scientific study of life and of living organisms. Botany, zoology, and ecology are all branches of biology.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

biology definition


The study of life and living systems.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Strong molecular biology training is required, .
The underlying biology of that scourge of modern humanity, cancer, looks as
  though it is about to yield its main secret.
High school biology will remind you that mitosis is the process of a single
  cell dividing into two identical cells.
All the natural history required to understand consciousness is now readily
  available in evolutionary biology and psychology.
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