A plant of the genus Marrubium (M. vulgare), which has a bitter taste, and is a weak tonic, used as a household remedy for colds, coughing, etc.
- An aromatic Eurasian plant (Marrubium vulgare) in the mint family, having square stems, opposite leaves with white pubescence, and numerous white flowers in axillary cymes. The leaves yield a bitter extract used in flavoring and as a cough remedy.
- A candy or preparation flavored with this extract.
- Any of similar or related plants, such as the black horehound.