1. rauwolfia(n = noun.substance) - any of several alkaloids extracted from the shrub Rauwolfia serpentina;
is a kind of alkaloid
2. rauwolfia(n = noun.plant) rauvolfia - any shrub or small tree of the genus Rauwolfia having leaves in whorls and cymose flowers; yield substances used medicinally especially as emetics or purgatives or antihypertensives;
is a kind of bush, shrub
is a member of genus rauvolfia, genus rauwolfia
has particulars: rauwolfia serpentina, snakewood