n. The shattering of minerals by the action of heat, especially when accompanied by a crackling sound
the GNU version of the Collaborative International Dictionary of English
n. The act of decrepitating; a crackling noise, such as salt makes when roasting.
The Century Dictionary and Cyclopedia
n. The act of snapping or bursting with a crackling noise on being heated, or the crackling noise, accompanying the flying asunder of their parts, made by various salts and minerals when heated.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the crackling or breaking up of certain crystals when they are heated
Word Usage
"Therefore the only safe way of determining whether decrepitation occurs or not is by testing the stone, preferably under field conditions."