decrepitation dec·re·pi·tation UK/dɪˌkɹɛpɪˈteɪʃən/ uncommon noun 1. the crackling or breaking up of certain crystals when they are heated Related words Word family decrepitate Broader terms crackle WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved.