decomposition
C1Substantiv/US /dˌiːkəmpoʊzˈɪʃən/ dēk-əmp-ōz-ĬSH-ən; UK /dˌiːkəmpoʊzˈɪʃən/ dēk-əmp-ōz-ĬSH-ən/
The act or process of resolving the constituent parts of a compound body or substance into its elementary parts; separation into constituent part; analysis; the decay or dissolution consequent on the removal or alteration of some of the ingredients of a.
