the state or quality of being fertile.
Biology. the ability to produce offspring; power of reproduction: the amazing fertility of rabbits.
the birthrate of a population.
(of soil) the capacity to supply nutrients in proper amounts for plant growth when other factors are favorable.

1375–1425; late Middle English fertilite (< Middle French) < Latin fertilitās. See fertile, -ity

nonfertility, noun
overfertility, noun
prefertility, noun
unfertility, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
fertility (fɜːˈtɪlɪtɪ)
1.  the ability to produce offspring, esp abundantly
2.  the state or quality of being fertile

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

late 15c., from Fr. fertilité, from L. fertilitatem, from fertilis (see fertile).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

fertility fer·til·i·ty (fər-tĭl'ĭ-tē)
The state of being fertile, especially the ability to produce young.

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
fertile   (fûr'tl)  Pronunciation Key 
  1. Capable of producing offspring, seeds, or fruit.

  2. Capable of developing into a complete organism; fertilized.

  3. Capable of supporting plant life; favorable to the growth of crops and plants.

fertility noun
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Scientists have produced fertility in genetically infertile mice by
  transplanting a gene from normal animals.
The target reductions in fertility rates were reached long ago.
Another is that the dance is derived from some mystical fertility dance.
The fertility industry is a largely unregulated field.
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