alecost

from The Century Dictionary.

• noun Costmary, Tanacetum Balsamita, a plant put into ale to give it an aromatic, flavor. See costmary.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) The plant costmary, which was formerly much used for flavoring ale.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The plant costmary, which was formerly much used for flavouring ale.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun 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