coefficient of expansion

noun Physics.

the fractional change in length, area, or volume per unit change in temperature of a solid, liquid, or gas at a given constant pressure.

Origin of coefficient of expansion

First recorded in 1870–75
Also called expansivity. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for coefficient of expansion

coefficient of expansion


the amount of expansion (or contraction) per unit length of a material resulting from one degree change in temperatureAlso called: expansivity
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012