WordNet (r) 3.0 (2006):

mint geranium
    n 1: tansy-scented Eurasian perennial herb with buttonlike
         yellow flowers; used as potherb or salad green and
         sometimes for potpourri or tea or flavoring; sometimes
         placed in genus Chrysanthemum [syn: costmary, alecost,
         bible leaf, mint geranium, balsam herb, Tanacetum
         balsamita, Chrysanthemum balsamita]