'Water horehound' definitions:
Definition of 'water horehound'
(from WordNet)
noun
Aromatic perennial herb of United States [syn: water horehound, Lycopus americanus]
Definition of 'Water horehound'
From: GCIDE
- Water horehound \Wa"ter hore"hound`\ (Bot.) Bugleweed. [1913 Webster]