Hyperpyrexia
Pronunciation : Hy`per*py*rex"i*a
Part of Speech : n.
Etymology : [NL. See Hyper-, and Pyrexia.] (Med.)
Definition : Defn: A condition of excessive fever; an elevation of temperature in a disease, in excess of the limit usually observed in that disease.
Source : Webster's Unabridged Dictionary, 1913