Definition of decrepitate in US English:

decrepitate

verb

[no object]technical
  • (of a crystal or an inclusion of something within a crystal) disintegrate audibly when heated.

    • ‘Some pyrrhotite is relatively unstable in humid environments, decrepitating like pyrite.’
    • ‘The concentrate must expand to a high degree without decrepitating, and the expanded particles must be strong enough to withstand handling.’
    • ‘Furthermore, much marcasite is highly unstable when exposed to the atmosphere and decrepitates quickly.’
    • ‘On heating in a closed tube it decrepitates slightly, blackens and gives off water having an alkaline reaction.’
    • ‘The rock is so thoroughly altered it decrepitates on exposure to the atmosphere.’
    sizzle, crackle, fizz, hiss, spit, sputter, crack, snap
    View synonyms

Origin

Mid 17th century: from de- ‘away’ + Latin crepitat- ‘crackled’, from the verb crepitare, frequentative of crepare ‘rattle’ (see decrepit).

Pronunciation

decrepitate

/dēˈkrəpəˌtāt//diˈkrəpəˌteɪt/