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Infrared

//ˌɪnfɹəˈɹed// adj, noun

Adjective

1
Having a wavelength in the infrared spectrum. not-comparable
2
Relating to very low energies or very large distances or time spans. figuratively, not-comparable
"Unless otherwise stated, we will be working in Euclidean space compactified to a sphere in order to avoid infrared problems."

Adjective

1
having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end wordnet

Noun

1
The electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm. uncountable
"Collisions of these 'transparent' molecules with the molecules that do have absorption bands in the infrared can have a considerable influence on the intensities of the observed absorption bands."
2
the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range wordnet
3
A specific wavelength in this range. countable
"Sonne has shown that by means of the luminous rays the temperature in the tissue may be raised to a higher degree than by the use of the infrareds."
4
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves wordnet
5
A device that emits infrared radiation. countable
"In his room, he could install his infrareds without being discovered."

Etymology 1

From infra- + red.

Etymology 2

From infra- + red.

Unscramble this word: infrared