WordNet (r) 3.0 (2006):

basil balm
    n 1: perennial herb of North America (New York to Illinois and
         mountains of Alaska) having aromatic leaves and clusters of
         yellowish-pink balls [syn: basil balm, Monarda
         clinopodia]
    2: fragrant European mint having clusters of small violet-and-
       white flowers; naturalized especially in eastern North
       America [syn: basil thyme, basil balm, mother of thyme,
       Acinos arvensis, Satureja acinos]