Source : Webster's Revised Unabridged Dictionary (1913)

Tarragon \Tar"ra*gon\, n. [Sp. taragona, Ar. tarkh?n; perhaps
   fr. Gr. ? a dragon, or L. draco; cf. L. dracunculus tarragon.
   Cf. {Dragon}.] (Bot.)
   A plant of the genus {Artemisa} ({A. dracunculus}), much used
   in France for flavoring vinegar.

Source : WordNet®

tarragon
     n 1: aromatic perennial of southeastern Russia [syn: {estragon},
          {Artemisia dracunculus}]
     2: fresh leaves (or leaves preserved in vinegar) used as
        seasoning [syn: {estragon}]