ultraviolet radiation
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Cultural Dictionary
ultraviolet radiation definition
Radiation in the part of the electromagnetic spectrum where wavelengths are just shorter than those of ordinary, visible violet light but longer than those of x-rays.
Note: Like infrared radiation, ultraviolet radiation can be detected with special instruments or films. Sunburn is caused by ultraviolet radiation. The ozone layer of the atmosphere of the Earth blocks most of the potentially harmful ultraviolet radiation.
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.
Cite This Source
WordNet
| ultraviolet radiation | |
noun | |
| radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays [syn: ultraviolet] |
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Ultraviolet radiation
is always a great word to know.
So is ninnyhammer. Does it mean:
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| a fool or simpleton; ninny. |
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