Advertisement

Advertisement

R-value

[ ahr-val-yoo ]

noun

  1. 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.


Discover More

Word History and Origins

Origin of R-value1

1945–50; R, symbol for resistance

Advertisement

Advertisement

Advertisement

Advertisement


RVR.V.S.V.P.