R-value

[ ahr-val-yoo ]

/ ˈɑrˌvæl yu /

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noun

a measure of the resistance of an insulating or building material to heat flow, expressed as R-11, R-20, and so on; the higher the number, the greater the resistance to heat flow.

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Origin of R-value

1945–50; R, symbol for resistance

Words nearby R-value

Ruysch's muscle, Ruysdael, Ruyter, Ružička, RV, R-value, RVH, R.V.S.V.P., R/W, RWA, Rwanda

Example sentences from the Web for R-value

But there's a ton of value for me in my background and my history, and losing it would be a shame.
My Week on Jewish Tinder|Emily Shire|January 5, 2015|DAILY BEAST
There is reference after reference to the “black community,” “black worth ethic,” and adherence to the “black value system.”
Reverend Jeremiah Wright Was Worse Than Scalise|Ron Christie|January 2, 2015|DAILY BEAST
For his part, House Speaker John Boehner (R-OH) has expressed his “full confidence” in Representative Scalise.
Reverend Jeremiah Wright Was Worse Than Scalise|Ron Christie|January 2, 2015|DAILY BEAST
As Randy notes, “Maybe there is a value in shining a light on this and asking the questions.”
Your Husband Is Definitely Gay: TLC’s Painful Portrait of Mormonism|Samantha Allen|January 1, 2015|DAILY BEAST

Canned drinks like Mercy contain up 5,000 percent of the daily value of certain vitamins.
History's Craziest Hangover Cures|Justin Jones|December 30, 2014|DAILY BEAST
Other things being equal, the volume of voice used measures the value that the mind puts upon the thought.
Expressive Voice Culture|Jessie Eldridge Southwick
Of course the expression of this value is modified and characterized by the nature of the thing spoken of.
Expressive Voice Culture|Jessie Eldridge Southwick
Was a pupil of Caspar Netscher of Heidelberg, whose little pictures are of fabulous value.
Women in the fine arts, from the Seventh Century B.C. to the Twentieth Century A.D.|Clara Erskine Clement
He must trust to his human merits, and not miracles, for his Sonship is of no value in this conflict.
Solomon and Solomonic Literature|Moncure Daniel Conway
Q was a Queen, who wore a silk slip; R was a Robber, and wanted a whip.
Boys and Girls Bookshelf; a Practical Plan of Character Building, Volume I (of 17)|Various

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R-value

noun

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Origin of R-value

Words nearby R-value

Example sentences from the Web for R-value