noun

infrared

ihnf-ruh-REHD

noun

Light energy just beyond the red end of the visible spectrum, felt as heat but invisible to the eye.

"Night-vision goggles work by detecting infrared given off by warm bodies."

"The remote control sends signals to the TV using infrared."

adj

Relating to or using this kind of radiation.

"The camera has an infrared sensor for low-light shots."

How to Use Infrared

Learner’s notes

In plain EnglishInvisible heat-radiation light, used in remotes, night vision, and heaters.

Common pairings

infrared camera infrared radiation infrared sensor

infrareds plural

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Can you complete this real example?

Night-vision goggles work by detecting _____ given off by warm bodies.

From "infra-" ("below") + "red," describing wavelengths just below visible red light.

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