[1] : The Collaborative International Dictionary of English v.0.48

herb \herb\ ~erb or h~erb; 277, n. oe. herbe, erbe, of.
   herbe, erbe, f. herbe, l. herba; perh. akin to gr. forbh`
   food, pasture, fe`rbein to feed.
   1. a plant whose stem does not become woody and permanent,
      but dies, at least down to the ground, after flowering.
      1913 webster

   note: annual herbs live but one season; biennial herbs flower
         the second season, and then die; perennial herbs
         produce new stems year after year.
         1913 webster

   2. grass; herbage.
      1913 webster

            and flocks
            grazing the tender herb.              --milton.
      1913 webster

   herb bennet. bot. see bennet.

   herb christopher bot., an herb actaea spicata,
      whose root is used in nervous diseases; the baneberry. the
      name is occasionally given to other plants, as the royal
      fern, the wood betony, etc.

   herb gerard bot., the goutweed; -- so called in honor of
      st. gerard, who used to be invoked against the gout. --dr.
      prior.

   herb grace, or herb of grace. bot. see rue.

   herb margaret bot., the daisy. see marguerite.

   herb paris bot., an old world plant related to the
      trillium paris quadrifolia, commonly reputed
      poisonous.

   herb robert bot., a species of geranium geranium
      robertianum.
      1913 webster
see also:
herb bennet bennet herb christopher actaea spicata herb gerard herb grace 
herb of grace rue herb margaret marguerite herb paris 
paris quadrifolia herb robert geranium geranium robertianum 

[2] : WordNet (r) 2.0

herb of grace
     n : european strong-scented perennial herb with gray-green
         bitter-tasting leaves; an irritant similar to poison ivy
         syn: rue, ruta graveolens
see also:
rue ruta graveolens 

Herb >> H Words
Herb, definition of term: Herb
herb_pag1.html

Grace >> G Words
Grace, definition of term: Grace
grace_pag1.html

Grace Note >> G Words
Grace Note, definition of term: Grace Note
grace+note_pag1.html

Coup De Grace >> C Words
Coup De Grace, definition of term: Coup De Grace
coup+de+grace_pag1.html