Pellitory \Pel"li*to*ry\, n. [Sp. pelitre, fr. L. pyrethrum. See
{Bertram}.] (Bot.)
(a) A composite plant ({Anacyclus Pyrethrum}) of the
Mediterranean region, having finely divided leaves and
whitish flowers. The root is the officinal pellitory, and
is used as an irritant and sialogogue. Called also
{bertram}, and {pellitory of Spain}.
(b) The feverfew ({Chrysanthemum Parthenium}); -- so called
because it resembles the above.
[1913 Webster]