Word Study
tansy
CIDE DICTIONARY
tansy, n. [OE. tansaye, F. tanaise; cf. It. & Sp. tanaceto, NL. tanacetum, Pg. atanasia, athanasia, Gr. 'aqanasi`a immortality, fr. 'aqa`natos immortal; 'a priv. + qa`natos death.].
- 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. [1913 Webster] - 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. Pepys. [1913 Webster]
OXFORD DICTIONARY
tansy, n. (pl. -ies) any plant of the genus Tanacetum, esp. T. vulgare with yellow button-like flowers and aromatic leaves, formerly used in medicines and cookery.
Etymology
ME f. OF tanesie f. med.L athanasia immortality f. Gk
For further exploring for "tansy" in Webster Dictionary Online