infrared

adjective

in·fra·red | \ ˌin-frə-ˈred

, -(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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Examples of infrared in a Sentence

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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.