From Longman Dictionary of Contemporary Englishrigor mortisrig‧or mor‧tis /ˌrɪɡə ˈmɔːtəs, ˌraɪɡɔː- $ ˌrɪɡər ˈmɔːr-/ noun [uncountable] HBHMXthe condition in which someone’s body becomes stiff after they die
Examples from the Corpus
rigor mortis• What was all this about rigor mortis?• It did not have a trace of rigor mortis, and was as warm as my own body.Origin rigor mortis (1800-1900) Modern Latin “stiffness of death” 