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extinction - 7 dictionary results
ex⋅tinc⋅tion
[ik-stingk-shuh
n]
–noun
| 1. | the act of extinguishing. |
| 2. | the fact or condition of being extinguished or extinct. |
| 3. | suppression; abolition; annihilation: the extinction of an army. |
| 4. | Biology. the act or process of becoming extinct; a coming to an end or dying out: the extinction of a species. |
| 5. | Psychology. the reduction or loss of a conditioned response as a result of the absence or withdrawal of reinforcement. |
| 6. | Astronomy. the diminution in the intensity of starlight caused by absorption as it passes through the earth's atmosphere or through interstellar dust. |
| 7. | Crystallography, Optics. the darkness that results from rotation of a thin section to an angle (extinction angle) at which plane-polarized light is absorbed by the polarizer. |
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To extinction
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Extinction
Ex*tinc"tion\, n. [L. extinctio, exstinction: cf. F. extinction.]1. The act of extinguishing or making extinct; a putting an end to; the act of putting out or destroying light, fire, life, activity, influence, etc. 2. State of being extinguished or of ceasing to be; destruction; suppression; as, the extinction of life, of a family, of a quarrel, of claim.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Language Translation for : extinction
Spanish:
extinción,
German:
das Aussterben,
Japanese:
絶滅
extinction
The disappearance of a species from the Earth.
Note: The fossil record tells us that 99.9 percent of all species that ever lived are now extinct.
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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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Main Entry: ex·tinc·tion
Pronunciation: ik-'sti[ng](k)-sh&n
Function: noun
1 : the process of becoming extinct
2 : the process of eliminating or reducing a conditioned response by notreinforcing it
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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extinction ex·tinc·tion (ĭk-stĭngk'shən)
n.
Progressive reduction in the strength of the conditioned response in successive conditioning trials during which only the conditioned stimulus is presented and the unconditioned stimulus is omitted. See absorbance.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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extinction (ĭk-stĭngk'shən) Pronunciation Key
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The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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