costmary

noun

cost·​mary ˈkȯst-ˌmer-ē 

ˈkäst-

plural costmaries

: an aromatic composite Eurasian herb (Chrysanthemum balsamita synonym Tanacetum balsamita) having leaves used as a potherb and in flavoring

Word History

Etymology

Middle English costmarie, from coste costmary (from Old English cost, from Latin costum, from Greek kostos, a fragrant root) + Marie the Virgin Mary

First Known Use

15th century, in the meaning defined above