['eilkɔst]
n.
[植]艾菊(用于给麦芽酒调味)

[ 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
<noun.plant>

Alecost \Ale"cost`\, n. [Ale + L. costus an aromatic plant: cf.
{Costmary}.] (Bot.)
The plant costmary, which was formerly much used for
flavoring ale.
※ ||

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}.