[ ahr-val-yoo ]
/ ˈɑrˌvæl yu /
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.
DON’T VACILLATE! VANQUISH THIS WORD OF THE DAY QUIZ!
It’d be a real faux pas to miss this quiz on the words from August 3–9, 2020!
Question 1 of 7
What does “vacillate” mean?
Origin of R-value
1945–50; R, symbol for resistance
Words nearby R-value
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020