Fe′ver·few (·fū), 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.