noun: muscular stiffening that begins 2 to 4 hours after death and last for about 4 days
noun: temporary stiffness of joints and muscular rigidity occurring after death

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Schauberger
In the opposite case, annihilating fire and its cohorts, including toxic gases, are created, which in association with the debilitating temperature-forms from which rigor mortis develops, foster the proliferation of bacteria. [The Energy Evolution - Harnessing Free Energy from Nature, The Life-Current in Air and Water]