![](https://webarchive.library.unt.edu/eot2008/20090514025440im_/http://www.cancer.gov/images/spacer.gif) |
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(IN-ter-FEER-ing thawt)
![](https://webarchive.library.unt.edu/eot2008/20090514025440im_/http://www.cancer.gov/images/spacer.gif)
| An unpleasant memory or idea that occurs often in a person’s everyday thoughts and keeps him or her from thinking about other things. Interfering thoughts can make sleep difficult and make a person unable to carry out daily activities. Also called intrusive thought. |
Previous Definitions: | Institutional Review Board, insulin, intensification therapy, intensity-modulated radiation therapy, intercalator | Next Definitions: | interferon, interleukin, interleukin-1, interleukin-1-alfa, interleukin-1-alpha |
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![](https://webarchive.library.unt.edu/eot2008/20090514025440im_/http://www.cancer.gov/images/spacer.gif) |