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.

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British Dictionary definitions for coefficient of expansion

coefficient of expansion

noun

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