ecology
US /iˈkɑː.lə.dʒi/
UK /iˈkɑː.lə.dʒi/
1.
the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
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She is studying ecology at university.
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The course covers various aspects of marine ecology.
2.
the political movement that seeks to protect the environment.
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The rise of environmental awareness has led to a stronger focus on ecology.
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Many political parties now include ecology in their platforms.