noun \ˈär-ˌval-(ˌ)yü\

Definition of R-VALUE

:  a measure of resistance to the flow of heat through a given thickness of a material (as insulation) with higher numbers indicating better insulating properties — compare u-value

Origin of R-VALUE

probably from thermal resistance
First Known Use: 1948


Next Word in the Dictionary: RVer
Previous Word in the Dictionary: RVA
All Words Near: R-value

Seen & Heard

What made you want to look up R-value? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More