ˈkȯstˌmerē, -ˌma(a)rē, -ˌmārē, -ri also ˈkäst- noun
( -es )
Etymology: Middle English costmarie, from coste costmary (from Old English cost, from Latin costum, from Greek kostos costusroot) + Marie Mary (the Virgin Mary )
1. : a tansy-scented herb ( Chrysanthemum balsamita ) that has yellow flowers shaped like buttons and is used as a potherb and salad plant and now less commonly in flavoring ale and beer — called also alecost, bible leaf
2. : the common tansy ( Tanacetum vulgare )