Heat rays

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a term formerly applied to the rays near the red end of the spectrum, whether within or beyond the visible spectrum.

See also: Heat

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The heat eventually turns into infrared radiation (heat rays) that escapes back into outer space.
The iconic three-tonne, 35ft tall Fighting Machine will be firing Heat Rays at the audience, and the new show will feature the incineration of a cast member on stage!
The audience were reminded that nothing survives a nuclear fireball of 300,000 degrees, nor the intense heat rays, blast or radiation of a deliberate nuclear explosion.
At 1.7 miles (2.73km) from the bomb's hypocentre, they were out of reach of its most intense infrared heat rays, which instantly carbonised human and animal flesh and vaporised the internal organs of those directly beneath the bomb.
In the original text, Planck later explains why he is diverging from Kirchhoff on this point: "Heat rays are destroyed by absorption.
A vast amount of radiation passed through people's bodies, and the city was struck by heat rays and a blast that defy imagination.
And if we do overindulge on heat rays, what is the best course of action?
At the centre of this maelstrom was Wayne himself, a diminutive but energetic figure who - as one tweeter put it - seemed to be having so much fun conducting events "despite the death and heat rays".
Schoeller has recently developed a new textile finish that helps textiles better absorb the sun's heat rays. Even thin fabrics can provide more warmth and keep the wearer comfortably warm.
The intense heat rays caused by the bomb charred the bodies of many victims.
TOKYO - A piece of clothing scorched in the shape of diamond patterns by the heat rays of the 1945 atomic bomb has been found to have been kept at the Ground Self-Defense Force Medical School in Tokyo's Setagaya Ward, according to interviews with school officials.