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frost point

American  

noun

  1. the temperature of the air at which hoarfrost begins to form.

Example Sentences

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Originally, the temperature of the southern polar cap was reported as -180�F., or roughly the frost point of carbon dioxide under Martian atmospheric pressure.

From Time Magazine Archive

Its infra-red radiometer measured the temperature of the area at � 253�F., or roughly the frost point of carbon dioxide on Mars.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.