Feverfew \Fe"ver*few\, n. [AS. feferfuge, fr. L. febrifugia. See {fever}, {Fugitive}, and cf. {Febrifuge}.] (Bot.) A perennial plant ({Pyrethrum, or Chrysanthemum, Parthenium}) allied to camomile, having finely divided leaves and white blossoms; -- so named from its supposed febrifugal qualities.