infrared

adjective
in·​fra·​red | \ ˌin-frə-ˈred How to pronounce infrared (audio) , -(ˌ)frä-, -fə-\

Definition of infrared

1 : situated outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and 1 millimeter
2 : relating to, producing, or employing infrared radiation infrared therapy
3 : sensitive to infrared radiation infrared sensors that detect body heat

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Other Words from infrared

infrared noun

Examples of infrared in a Sentence

Recent Examples on the Web

Bavarian space fans are proud of the NIRSpec, a near-infrared spectrometer that helps NASA’s James Webb Space Telescope detect the weakest radiation from galaxies. Sonja Peteranderl, The Verge, "Bavaria’s space program shot to viral fame — but it may be in trouble," 20 Oct. 2018 Here’s the video, posted by the U.S. Navy on YouTube, taken from a forward-looking infrared camera aboard the EP-3. Kyle Mizokami, Popular Mechanics, "U.S. Accuses Russian Fighter of 'Unsafe Intercept' Over Black Sea," 5 Nov. 2018 Additionally, the Totem's trackpad is ringed with LEDs, though iFixit doesn't confirm whether these emit near-infrared light for the sake of additional tracking. Sam Machkovech, Ars Technica, "iFixit dissects the $2,299 Magic Leap One so you don’t have to," 23 Aug. 2018 Creating these scans takes around 10 minutes and involves bouncing near-infrared light off of the interior surfaces of the eye. James Vincent, The Verge, "DeepMind’s AI can detect over 50 eye diseases as accurately as a doctor," 13 Aug. 2018 Blue light generates infrared light with an efficiency of about 180 percent. Chris Lee, Ars Technica, "Transparent solar cell turns edge on and generates its own light," 12 Dec. 2018 The infrared sauna has become a must in the wellness community and physical therapy practices alike. Mackenzie Wagoner, Vogue, "What’s the Best Way to Cleanse? A Guide to Detoxing in 2019," 1 Jan. 2019 However, the company included an optical infrared fingerprint sensor at the top-right corner of the E Ink panel. Valentina Palladino, Ars Technica, "Lenovo Yoga Book 2018 review: The keyless keyboard returns, now in E Ink," 2 Nov. 2018 The targets, conex shipping containers, were likely detected by the F-35’s Electro-Optical Targeting System, or EOTS, which uses forward-looking infrared sensors to pick out targets on the ground. Kyle Mizokami, Popular Mechanics, "F-35, Ground Rocket Launcher Team Up to Destroy Target with Pinpoint Accuracy," 8 Oct. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'infrared.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of infrared

1881, in the meaning defined at sense 1

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Statistics for infrared

Last Updated

11 Mar 2019

Look-up Popularity

Time Traveler for infrared

The first known use of infrared was in 1881

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More Definitions for infrared

infrared

adjective

English Language Learners Definition of infrared

technical : producing or using rays of light that cannot be seen and that are longer than rays that produce red light

infrared

adjective
in·​fra·​red | \ ˌin-frə-ˈred How to pronounce infrared (audio) \

Kids Definition of infrared

: being, relating to, or producing rays like light but lying outside the visible spectrum at its red end

infrared

adjective
in·​fra·​red | \ ˌin-frə-ˈred How to pronounce infrared (audio) \

Medical Definition of infrared

 (Entry 1 of 2)

1 : lying outside the visible spectrum at its red end used of radiation having a wavelength between about 700 nanometers and 1 millimeter
2 : relating to, producing, or employing infrared radiation infrared therapy

infrared

noun

Medical Definition of infrared (Entry 2 of 2)

: infrared radiation

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More from Merriam-Webster on infrared

Rhyming Dictionary: Words that rhyme with infrared

Spanish Central: Translation of infrared

Nglish: Translation of infrared for Spanish Speakers

Comments on infrared

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