verb (used with object), decrepitated, decrepitating.
to roast or calcine (salt, minerals, etc.) so as to cause crackling or until crackling ceases.
verb (used without object), decrepitated, decrepitating.
to break up when exposed to heat.

1640–50; < Neo-Latin dēcrepitātus crackled, past participle of dēcrepitāre, equivalent to Latin dē- de- + crepitāre to crackle (frequentative of crepāre to crack); see -ate1

decrepitation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
decrepitate (dɪˈkrɛpɪˌteɪt)
1.  (tr) to heat (a substance, such as a salt) until it emits a crackling sound or until this sound stops
2.  (intr) (esp of a salt) to crackle, as while being heated
[C17: from New Latin dēcrepitāre, from Latin crepitāre to crackle, from crepāre to creak]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
There is a known tendency for uranium dioxide in air to decrepitate into fine particles.
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