Source : Webster's Revised Unabridged Dictionary (1913)

Rosemary \Rose"ma*ry\, n. [OE. rosmarine, L. rosmarinus; ros dew
   (cf. Russ. rosa, Lith. rasa, Skr. rasa juice) + marinus
   marine: cf. F. romarin. In English the word has been changed
   as if it meant the rose of Mary. See {Marine}.]
   A labiate shrub ({Rosmarinus officinalis}) with narrow
   grayish leaves, growing native in the southern part of
   France, Spain, and Italy, also in Asia Minor and in China. It
   has a fragrant smell, and a warm, pungent, bitterish taste.
   It is used in cookery, perfumery, etc., and is an emblem of
   fidelity or constancy.

         There's rosemary, that's for remembrance. --Shak.

   {Marsh rosemary}.
   (a) A little shrub (Andromeda polifolia) growing in cold
       swamps and having leaves like those of the rosemary.
   (b) See under {Marsh}.

   {Rosemary pine}, the loblolly pine. See under {Loblolly}.

Source : WordNet®

Rosmarinus officinalis
     n : widely cultivated for its fragrant gray-green leaves used in
         cooking and in perfumery [syn: {rosemary}]