What is "pyrexia"

Pyrexia \Py*rex"i*a\, n.; pl. Pyrexi[ae]. [NL., fr. Gr. ? to be feverish, akin to ? fever.] (Med.) The febrile condition.

"fever," 1769, medical Latin, from Greek pyrexis "feverishness," from pyressein "to be feverish, to be ill of fever," from pyretos "fever, burning heat," related to pyr "fire" (see fire (n.)) + abstract noun ending -ia.

n. (label en medicine) fever

n. a rise in the temperature of the body; frequently a symptom of infection [syn: fever, febrility, febricity, feverishness]