Pyrexia is a related term of hyperpyrexia.
As nouns the difference between pyrexia and hyperpyrexia
is that pyrexia is (label) fever while hyperpyrexia is (medicine) an excessive and unusual elevation of set body temperature greater than or equal to 41°c (1058°f), or extremely high fever.
pyrexia
English
Noun
(-)
(label) fever
Derived terms
* pyrexic, pyrexial
Related terms
*
hyperpyrexia
Noun
(-)
(medicine) An excessive and unusual elevation of set body temperature greater than or equal to 41°C (105.8°F), or extremely high fever.
Related terms
* pyrexia
See also
* hyperthermia