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WordReference Random House Learner's Dictionary of American English © 2024in•fra•red /ˌɪnfrəˈrɛd/USA pronunciation n. [uncountable]- Physicselectromagnetic radiation or light that is invisible, near the red end of the spectrum.
adj. - Physicsof, relating to, or using infrared rays:infrared radiation.Compare ultraviolet.
WordReference Random House Unabridged Dictionary of American English © 2024in•fra•red (in′frə red′),USA pronunciation n. - Physicsthe part of the invisible spectrum that is contiguous to the red end of the visible spectrum and that comprises electromagnetic radiation of wavelengths from 800 nm to 1 mm.
adj. - Physicsnoting or pertaining to the infrared or its component rays:infrared radiation.Cf. ultraviolet.
Also, in′fra-red′. Collins Concise English Dictionary © HarperCollins Publishers:: infrared /ˌɪnfrəˈrɛd/ n - the part of the electromagnetic spectrum with a longer wavelength than light but a shorter wavelength than radio waves; radiation with wavelength between 0.8 micrometres and 1 millimetre
adj - of, relating to, using, or consisting of radiation lying within the infrared
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