infrared
noun
the 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 nanometers to 1 millimeter.
infra-red
-
a variation of
infrared.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Radiography and infra-red reflectography have revealed that Rubens began with what is now the center: the landscape and lower sky.
From The Wall Street Journal ● May 1, 2026
The glasses' camera captures visual scenes and projects them as an infra-red beam across the chip.
From Science Daily ● Oct. 20, 2025
The stars shine their light on us in the full range of the spectrum of light, from infra-red to gamma rays.
From Science Daily ● Dec. 21, 2023
There are other electric heating systems - immersion boilers, electric fires, fan heaters and infra-red radiators, for example - but none of these is as efficient as heat pumps.
From BBC ● Aug. 1, 2023
"These are pictures that officers took with infra-red cameras before moving in."
From Little Brother by Cory Doctorow
