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denoting electromagnetic radiation of wavelength greater than that of the red end of the spectrum, i.e., of 0.75–1000 μm. Infrared rays are sometimes subdivided into long-wave or far infrared (about 3.0–1000 μm) and short-wave or near infrared (about 0.75–3.0 μm). They are capable of penetrating body tissues to a depth of 1 cm. Sources of infrared rays include heat lamps, hot water bottles, steam radiators, and incandescent light bulbs. Infrared rays are used therapeutically to promote muscle relaxation, to speed up the inflammatory process, and to increase circulation to a part of the body. See also heat.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

in·fra·red (IR, ir),

That portion of the electromagnetic spectrum with wavelengths between 730 and 1000 nm.
Farlex Partner Medical Dictionary © Farlex 2012


That portion of the electromagnetic spectrum with wavelengths between 770-1000 nm.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


the electromagnetic radiation in the region between red light and radio waves. see ELECTROMAGNETIC SPECTRUM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

infrared (IR)

Radiant energy of wavelengths between the extreme red wavelengths of the visible spectrum and a wavelength of a few millimetres. The wave band comprising radiations between 780 and 1400 nm is referred to as IR-A. Excessive exposure to these radiations can cause visual loss (e.g. eclipse blindness) and cataract. The waveband comprising radiations between 1400 and 3000 nm is referred to as IR-B. Excessive exposure to these radiations can cause cataract and corneal opacity. The wave band comprising radiations between 3000 and 1 ✕ 106 nm (or 1 mm) is referred to as IR-C. Excessive exposure to these radiations can cause cataract (heat-ray cataract). See eclipse blindness; absorptive lens; infrared optometer.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Julie Tait from Lakes Alive, which organised the event in Carlisle to welcome the line of light to the city, said: "The Welcoming the Light event was a magical procession with a real sense of occasion and anticipation and a fantastic atmosphere.
The final beacon was ignited at Bowness-on-Solway, on Cumbria's west coast, about an hour later, with the entire "line of light" remaining illuminated for about half an hour.
Velvet describes its new line of light ice creams featuring Splenda as "a breakthrough product for ice cream lovers looking for a healthy dessert alternative." The line's five flavors include Velvet's specialty, Vanilla, as well as Caramel Crunch, Cherry Fudge Cordial, Double Chocolate Fudge, and Butter Pecan & Cashew.
The more minimal work on the first floor, Decoupe rasante et frontale (du sol au mur) (Low frontal spot [from floor to wall], 1994) takes over less of the space since it consists of a thin vertical line of light on the wall, like a crack.
There should have been exposure--more than curtains Drawn, the stairway coiling to the floor Where no one walked, the sheeted furniture, And one thin line of light beneath the door.
A new line of Light Duty Trailers provides a cost-effective, durable solution for transporting loads up to 1,000 pounds.
The line of light is due arrive at Steel Rigg in Northumberland in the central section of the Wall at 6.20pm and at 6.40pm in Carlisle, ending at around 7pm in Bowness-on-Solway in Cumbria.
The blackout over Tyneside and south Northumberland is designed to show off the ambitious coast-to-coast line of light in its full glory.
One single but excellent line of light rail, which Coun Whitby clearly does not want to extend, and an equally excellent bus network, stifled and made unreliable by Coun Whitby's dithering on new bus priority measures and lack of enforcement of the few that we have.
Alouette, Boursin, Fleur de Lait, and Rondele each has a line of light spreads that cuts the sat fat to three grams or less.
The material, an RTP Series 300 precolored polycarbonate compound, uses an edge glow color effect to emit a steady, defined line of light that serves to draw the golfer's eye to align the putter.
For a perfect hip roll, imagine a line of light going vertically straight down through your body and try to draw circles on the floor with that light