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infrared3 entries found for infrared.To select an entry, click on it. Main Entry: in·fra·red  Pronunciation: "in-fr&-'red, -(")frä-, -f&- Function: adjective 1 : situated outside the visible spectrum at its red end -- used of radiation having a wavelength between about 700 nanometers and 1 millimeter 2 : relating to, producing, or employing infrared radiation <infrared therapy> 3 : sensitive to infrared radiation <infrared sensors that detect body heat> - infrared noun
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