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

The Cambridge group’s first perovskite LEDs glowed near-infrared, red, or green, depending on their makeup. Robert F. Service, Science | AAAS, "LEDs created from wonder material could revolutionize lighting and displays," 4 June 2019 SPHEREx will make these maps by gazing out into the universe with optical and near-infrared light. David Grossman, Popular Mechanics, "New NASA Mission Will Create Maps of the Sky Like Never Before," 14 Feb. 2019 Directly imaging planets with infrared light only works occasionally and can still miss crucial details. Avery Thompson, Popular Mechanics, "New Method For Studying Exoplanets Could Tell Us Far More About Alien Worlds," 29 Mar. 2019 In one 2015 Springerplus study, for example, researchers found that both traditional and infrared saunas improved exercise recovery in 10 physically active men who used saunas regularly. SELF, "Does the Steam Room at the Gym Actually Do Anything?," 4 Jan. 2019 These cyclones seem remarkably stable over the time that Juno has imaged them in the visible and infrared. Andrew Coates, Newsweek, "NASA Juno Unlocks Secrets of Jupiter's Mega Cyclone Clusters," 8 Mar. 2018 Insite's infrared cameras feed images into a computer running video analytics. Town & Country, "How the Wealthy Protect Themselves," 6 Dec. 2012 Shannon referenced a 1998 New York Times article, which thanks to infrared light technology, was able to report that Susan's name had been erased from over 10 of Dickinson's writings. Chloe Foussianes, Town & Country, "Watch Molly Shannon Play Emily Dickinson as a Funny, Passionate Lesbian in Wild Nights with Emily," 7 Mar. 2019 Hand ID takes advantage of the camera’s infrared sensor to read the absorption characterization of hemoglobin in the veins of your hand. Michael Simon, PCWorld, "LG G8 hands-on: Could the future of smartphones be in the palm of my hand?," 24 Feb. 2019

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

17 Jun 2019

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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

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