[ 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.
Are Scrabble Tile Values In Need Of An Overhaul?Invented by out-of-work architect Alfred Butts during the Great Depression, Scrabble is a staple of word lovers’ lives. The popularity of this beloved game took off in the mid-1950s and has been an essential part of the canon of classic board games ever since. To determine Scrabble’s tile values, Alfred Butts carefully analyzed letter frequency in various periodicals, including the front page of the New York …
Were P And R Once The Same Letter?Do you ever stop and look at the shape of our alphabet? Each letter looks natural to us now, but all those lines and circles have unique histories. It’s easy to make assumptions that our letters make sense, that they developed in some orderly logical way, and one reasonable assumption would be that P and R are related to each other based on their form. …
Origin of R-value
1945–50; R, symbol for resistance
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019