/hawr"hownd', hohr"-/ , n.
1. an Old World plant, Marrubium vulgare, of the mint family, having downy leaves and small, whitish flowers, and containing a bitter, medicinal juice that is used as an expectorant, vermifuge, and laxative.
2. any of various plants of the mint family.
3. a brittle candy or lozenge flavored with horehound extract.
Also, hoarhound .
[ bef. 1000; ME horehune, OE harhune, equiv. to har gray, HOAR + hune horehound ]