biodiversity

[bahy-oh-di-vur-si-tee, ‐dahy‐]
noun
diversity among and within plant and animal species in an environment.

Origin:
1985–90, Americanism

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
biodiversity (ˌbaɪəʊdaɪˈvɜːsɪtɪ)
 
n
the existence of a wide variety of plant and animal species in their natural environments, which is the aim of conservationists concerned about the indiscriminate destruction of rainforests and other habitats

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

biodiversity
by 1988, from bio- + diversity.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
biodiversity   (bī'ō-dĭ-vûr'sĭ-tē)  Pronunciation Key 
The number, variety, and genetic variation of different organisms found within a specified geographic region.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

biodiversity definition


A term that describes the number of different species that live within a particular ecosystem.

Note: The preservation of biodiversity is considered by environmentalists to be a major goal of environmental policy.
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
When it comes to biodiversity, all land is definitely not created equal.
Loss of biodiversity translates into economic losses to agriculture, medicine
  and the biotech industries.
Scientists have known about this equatorial bulge of biodiversity for more than
  a century, yet its explanation remained elusive.
Molecular data are nowadays an indispensable source of information to answer
  research questions in ecology and biodiversity.
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