Merriam-Webster Collegiate Dictionary - mugwort

 noun  Etymology: Middle English, from Old English mucgwyrt, from mucg- (perhaps akin to Old English mycg midge) + wyrt wort  Date: before 12th century  1. any of several artemisias; especially a Eurasian perennial herb (Artemisia vulgaris) that is naturalized in North America and has aromatic leaves used in folk medicine and to flavor beverages  2. the leaves of a ~ — compare moxa