Source : Webster's Revised Unabridged Dictionary (1913)

Woodruff \Wood"ruff`\, Woodroof \Wood"roof`\, n. [AS. wudurofe.
   See {Wood}, n., and cf. {Ruff} a plaited collar.] (Bot.)
   A little European herb ({Asperula odorata}) having a pleasant
   taste. It is sometimes used for flavoring wine. See Illust.
   of {Whorl}.

Source : WordNet®

Asperula odorata
     n : Old World fragrant stoloniferous perennial having small
         white flowers and narrow leaves used as flavoring and in
         sachets; widely cultivated as a ground cover; in some
         classifications placed in genus Asperula [syn: {sweet
         woodruff}, {waldmeister}, {woodruff}, {fragrant bedstraw},
          {Galium odoratum}]