infrared
|in-fra-red|
/ˌɪnfrəˈrɛd/
beyond red light
Etymology
'infrared' originates from the Latin word 'infra,' meaning 'below,' and the English word 'red,' referring to the color red in the visible spectrum.
'infrared' was coined in the 19th century to describe radiation beyond the red end of the visible spectrum.
Initially, it referred to radiation beyond visible red light, and this meaning has remained consistent.
Meanings by Part of Speech
Noun 1
the part of the electromagnetic spectrum with wavelengths just beyond the red end of the visible light spectrum.
The infrared of the spectrum is invisible to the human eye.
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Adjective 1
relating to or denoting electromagnetic radiation with wavelengths longer than those of visible light but shorter than those of radio waves.
Infrared cameras are used for night vision.
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Last updated: 2025/01/11 11:45