The Collaborative International Dictionary of English v.0.48:

Asarabacca \As`a*ra*bac"ca\, n. [L. asarum + bacca a berry. See
   Asarone.] (Bot.)
   An acrid herbaceous plant (Asarum Europ[ae]um), the leaves
   and roots of which are emetic and cathartic. It is
   principally used in cephalic snuffs.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Asarone \As"a*rone\, n. [L. asarum hazelwort, wild spikenard,
   Gr. 'a`saron] (Chem.)
   A crystallized substance, resembling camphor, obtained from
   the Asarum Europ[ae]um; -- called also camphor of asarum.
   [1913 Webster]