Infrared
English Meaning
Lying outside the visible spectrum at its red end; -- said of rays less refrangible than the extreme red rays.
- Of or relating to the range of invisible radiation wavelengths from about 750 nanometers, just longer than red in the visible spectrum, to 1 millimeter, on the border of the microwave region.
- Generating, using, or sensitive to infrared radiation.
- Infrared light or the infrared part of the spectrum.