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.

QUIZ

TAKE JOY IN ACING THIS QUIZ ON “PRIDE” SYNONYMS

Hold your head up high as you embark on this quiz that explores some of the synonyms and meanings of “pride.”

Question 1 of 7

What does "dignity" mean?

showing self-respect

treating others with kindness

acting selfishly

TAKE THE QUIZ TO FIND OUT

Compare U-value.

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

How to use R-value in a sentence

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