febrile /fē″bril, feb″ril/ [L, febris, fever] , pertaining to or characterized by an elevated body temperature, such as a febrile reaction to an infectious agent. A body temperature above 100° F (37.8° C), or 99.6° F (37.6° C) rectally, is commonly regarded as febrile. Compare afebrile. −febrility, n.
