Ale·cost n.  Bot. The plant costmary, which was formerly much used for flavoring ale.
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  alecost
       n : 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, bible leaf, mint
           geranium, balsam herb, Tanacetum balsamita, Chrysanthemum
           balsamita]