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
<noun.plant>
leaves used sparingly (because of bitter overtones) in sauces and soups and stuffings
<noun.food>
Costmary \Cost"ma*ry\ (k?st"m?-r?), n. [L. costum an Oriental aromatic plant (Gr. ???, cf. Ar. kost, kust) + Maria Mary. Cf. {Alecost}.] (Bot.) A garden plant ({Chrysanthemum Balsamita}) having a strong balsamic smell, and nearly allied to tansy. It is used as a pot herb and salad plant and in flavoring ale and beer. Called also {alecost}.