n., pl., -ies.
A Eurasian perennial herb (Chrysanthemum balsamita) in the composite family, having aromatic foliage sometimes used for potpourri, tea, or flavoring.
[Middle English costmarie : cost, costmary (from Old English , from Latin costum , from Greek kostos , from Sanskrit kuṣṭhaḥ) + marie, Mary, the mother of Jesus.]





