Definition of "febrifuge"

...therein it differs not from the mode of operation, which we observe in the famous peruvian febrifuge.

1734, William Stukeley, Of the Gout, J. Roberts, page 19

Ah, my boy, you forget the card index! Librarians invented that soothing device for the febrifuge of their souls...

1919, Christopher Morley, The Haunted Bookshop‎, New York, N.Y.: Grosset & Dunlap Publishers, page 20

And, by goodness, the door was ajar into the hall, for Constance had slipped out to the nearest pharmacy in search of a febrifuge for her fever-bound lover.

1983, Lawrence Durrell, Sebastian (Avignon Quintet), Faber & Faber, published 2004, page 1131