Found 2 items, similar to hyperpyrexia.
English → English (WordNet) Definition: hyperpyrexia hyperpyrexia n : extremely high fever (especially in children)
English → English (gcide) Definition: Hyperpyrexia Hyperpyrexia \Hy`per*py*rex"i*a\, n. [NL. See Hyper-, and Pyrexia.] (Med.) A condition of excessive fever; an elevation of temperature in a disease, in excess of the limit usually observed in that disease. [1913 Webster]