ultrared

[uhl-truh-red]

noun

1. (not in technical use) infrared.

ultrared

/ ˌʌltrəˈrɛd /

adjective

1. an obsolete word for infrared

Word History and Origins

Origin of ultrared¹

First recorded in 1865–70; ultra- + red ¹

Example Sentences

Objects in the outer solar system tend to be red, caused by the chemical reactions induced by radiation, but the cold classicals are even redder — ultrared, astronomers say.

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She’s abandoned her ultrared lipstick and nail polish and her tumed-up collars and has taken up moderate pinks and going on diets, and grooming.

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The extension, too, of the visible solar spectrum into the ultra-violet by Corun, Mascart, and others, adds much to our knowledge of the sun; while the photographs of Abney in the ultrared increase our information in a direction less expected and certainly less easy of attainment.

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