A plant of the genus Marrubium (Marrubium vulgare), which has a bitter taste, and is a weak tonic, used as a household remedy for colds, coughing, etc. (Written also hoarhound)
2.
A lozenge or tablet, usually sweetened, containing extract of horehound, used as a remedy for a cough or a sore throat.
Fetid horehound, or Black horehound, a disagreeable plant resembling horehound (Ballota nigra).
Water horehound, a species of the genus Lycopus, resembling mint, but not aromatic.
