| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,764,917,002 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
extinction |
Also found in: Legal, Encyclopedia, Wikipedia, Hutchinson | 0.01 sec. |
|
extinction /ex·tinc·tion/ (eks-tink´shun) in psychology, the disappearance of a conditioned response as a result of nonreinforcement; also, the process by which the disappearance is accomplished.
extinction [iksting′shən] a state of being lost or destroyed. extinction the disappearance of a conditioned response as a result of nonreinforcement. extinction Psychiatry A facet of operant–classical conditioning, in which the conditioned response is weakened and eventually disappears by nonreinforcement. See Operant conditioning, Respondent conditioning, Sensory extinction. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | ||
|---|---|---|---|
| The relative contributions of human settlers and a changing climate to ancient Australian animal extinctions remain controversial (SN: 6/18/05, p. Most kids surveyed worry about pollution (68 percent), animal extinction (62 percent) and trash (59 percent) as well as acid rain (31 percent) or the ice caps melting (26 percent). In explaining the process of animal extinctions, the book profiles scores of exotic and mundane creatures that have disappeared or in some cases come back from the brink of extinction. |
| Medical Dictionary |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|