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.
any of various plants of the mint family.
a brittle candy or lozenge flavored with horehound extract.
Also called white horehound. a downy perennial herbaceous Old World plant, Marrubium vulgare, with small white flowers that contain a bitter juice formerly used as a cough medicine and flavouring: family Lamiaceae (labiates) See also black horehound
water horehound, another name for bugleweed (sense 1)
Old English hārhūne, from hār grey + hūne horehound, of obscure origin