This is about the medical condition. For other uses, see Fever . | ICD9 = | ICDO = | Image = | Caption = | OMIM = | MedlinePlus = |u eMedicineSubj = med | eMedicineTopic = 785 | DiseasesDB = 18924 |}} showing the temperature of 38.7 °C]]Fever (also known as pyrexia, or a febrile response from the Latin word febris, meaning fever, and archaically known as ague) pyrexia from the Greek pyretos meaning