Tansy

n.
  1. (Bot.) Any plant of the composite genus Tanacetum. The common tansy (Tanacetum vulgare) has finely divided leaves, a strong aromatic odor, and a very bitter taste. It is used for medicinal and culinary purposes.
  2. A dish common in the seventeenth century, made of eggs, sugar, rose water, cream, and the juice of herbs, baked with butter in a shallow dish.
    3. Double tansy (Bot.),
    a variety of the common tansy with the leaves more dissected than usual.
    Tansy mustard (Bot.),
    a plant (Sisymbrium canescens) of the Mustard family, with tansylike leaves.