defervescence UK /ˌdɛfəˈvɛsəns/US /ˌdɛfɚˈvɛsəns/ noun1 •The departure or subsiding of a fever.Endogenous interleukin-10 is required for the defervescence of fever evoked by local lipopolysaccharide-induced and Staphylococcus aureus-induced inflammation in rats. — 2003 formsdefervescences