febrific

• It should seem, that in this great body, there are two sorts of motions, the one natural and the other febrific, as there are in ours. —  The Essays of Montaigne — Complete
• I had that year been dangerously ill of a fever in Holland; and when I was recovered of it, the febrific humor fell into my legs, and swelled them to that degree, and chiefly in the evening, that it was as painful to me as it was shocking to others. —  Letters to His Son on the Art of Becoming a Man of the World and a Gentleman, 1766-71
• But the stomach of our State, if we may be permitted to use the expression, is, as yet, too tender and febrific to allow such a fearful deglutition. —  History of Woman Suffrage, Volume II
• "Very likely," says the doctor: "I have known people eat in a fever; and it is very easily accounted for; because the acidity occasioned by the febrile matter may stimulate the nerves of the diaphragm, and thereby occasion a craving which will not be easily distinguishable from a natural appetite; but the aliment will not be concreted, nor assimilated into chyle, and so will corrode the vascular orifices, and thus will aggravate the febrific symptoms. —  History of Tom Jones, a Foundling

Roget's II: The New Thesaurus