infra-red

[in-fruh-red] Origin

in·fra·red

[in-fruh-red]
noun
1.
the part of the invisible spectrum that is contiguous to the red end of the visible spectrum and that comprises electromagnetic radiation of wavelengths from 800 nm to 1 mm.
adjective
2.
noting or pertaining to the infrared or its component rays: infrared radiation.

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Infra-red is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a gadget; dingus; thingumbob.
Also, in·fra-red.
Compare ultraviolet.


Origin:
1825–35; infra- + red1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To infra-red
Etymonline
Word Origin & History

infra-red
1881, from infra- (q.v.) + red.
Online Etymology Dictionary, © 2010 Douglas Harper
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