Source : Webster's Revised Unabridged Dictionary (1913)

Setterwort \Set"ter*wort`\, n. (Bot.)
   The bear's-foot ({Helleborus f[oe]tidus}); -- so called
   because the root was used in settering, or inserting setons
   into the dewlaps of cattle. Called also {pegroots}. --Dr.
   Prior.

Bear's-foot \Bear's"-foot`\ (-f[oo^]t`), n. (Bot.)
   A species of hellebore ({Helleborus f[oe]tidus}), with
   digitate leaves. It has an offensive smell and acrid taste,
   and is a powerful emetic, cathartic, and anthelmintic.

Source : WordNet®

Helleborus foetidus
     n : digitate-leaved hellebore with an offensive odor and
         irritant qualities when taken internally [syn: {stinking
         hellebore}, {bear's foot}, {setterwort}]