putrefaction
noun
[ ˌpjuːtrɪˈfakʃ(ə)n ]
• the process of decay or rotting in a body or other organic matter.
• "the breeze shifted and we caught the stench of putrefaction"
Origin:
late Middle English: from Old French, or from late Latin putrefactio(n- ), from putrefacere ‘make rotten’ (see putrefy).