Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Of or relating to electromagnetic radiation between microwaves and red visible light in the electromagnetic spectrum, having frequencies between 300 gigahertz and 400 terahertz and wavelengths between 1 millimeter and 750 nanometers.
- adjective Generating, using, or sensitive to infrared radiation.
- noun Infrared light or the infrared part of the spectrum.
from The Century Dictionary.
- Below the red.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Physics) Lying outside the visible spectrum at its red end; -- said of rays having a longer wavelength (and thus less refrangible) than the extreme red rays, specifically those electromagnetic waves having a wavelength of between 700 nanometers and 1 millimeter.
- adjective relating to, using, or producing infrared radiation.
- adjective affected by infrared radiation.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun
electromagnetic radiation of awavelength longer thanvisible light , but shorter thanmicrowave radiation, having a wavelength between 700nm and 1 mm - adjective Having the wavelength in the infrared.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adjective having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
- noun the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
- noun electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Anyone who understands chemistry also knows that carbon dioxide is a gas that transmits visible light, but attempts to retain infrared radiation.
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I bet he sees everything in infrared like the Predator, too.
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And here, made with the 31-inch telescope at UVa's Fan Mountain in the infrared, is M51:
Archive 2008-12-30 Nicole 2008
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Yep, the greenhouse effect works because light in the visible spectrum passes through “greenhouse” gases, while reradiated infrared is absorbed.
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A spectacular satellite image of Alaska's Malaspina Glacier in infrared, near infrared, and green wavelengths.
Archive 2006-05-01 2006
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A spectacular satellite image of Alaska's Malaspina Glacier in infrared, near infrared, and green wavelengths.
Malaspina 2006
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Because the Predator can “sparkle” a target at night — mark it in infrared so that A-10 pilots and grunts on the ground can see it with their night-vision goggles — it opens up a range of options that pilots and infantry never had before.
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Because the Predator can “sparkle” a target at night — mark it in infrared so that A-10 pilots and grunts on the ground can see it with their night-vision goggles — it opens up a range of options that pilots and infantry never had before.
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Essentially, the badges have 4 LED lights that light up when you get within infrared range of other attendees with similar profiles.
Archive 2005-09-01 2005
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Essentially, the badges have 4 LED lights that light up when you get within infrared range of other attendees with similar profiles.
milosrdenstvi commented on the word infrared
For quite a while when young I supposed this to be the past tense of infrare. Infrared rays...I still see it! Similarly, I thought it very possible to misle someone.
November 19, 2009
bilby commented on the word infrared
All Italian verbs end in -re. Although the past participle would be something like infratto, assuming it had a regular conjugation. But anyway we can go ahead and make a plausible nonsensical sentence, thus:
Con la nuova macchina fotografica digitale, mi viene la voglia di infrare.
- With my new digital camera I get the urge to take infrared photographs.
I don't know why I bothered to do that but it was quite satisfying.
November 19, 2009