radiation
Function: noun [noncount]
Meanings:
1 : a type ofdangerous and powerful energy that is produced by radioactive substances and nuclear reactions
Example:
<She was exposed to high levels of radiation.>
2 medical : the use of controlled amounts of radiationfor the treatment of diseases (such as cancer)
Example:
<He goes in for radiation next week.> — called also radiation therapy, radiotherapy
3 a : energy that comes from a source in the form of waves or rays you cannot see
Example:
<ultraviolet radiation>
3 b technical : the process of giving off energy in the form of waves or rays you cannot see
Example:
<the sun's radiation of heat>
Meanings:
1 : a type ofdangerous and powerful energy that is produced by radioactive substances and nuclear reactions
Example:
<She was exposed to high levels of radiation.>
2 medical : the use of controlled amounts of radiationfor the treatment of diseases (such as cancer)
Example:
<He goes in for radiation next week.> — called also radiation therapy, radiotherapy
3 a : energy that comes from a source in the form of waves or rays you cannot see
Example:
<ultraviolet radiation>
3 b technical : the process of giving off energy in the form of waves or rays you cannot see
Example:
<the sun's radiation of heat>
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