Source : Webster's Revised Unabridged Dictionary (1913)

Harebell \Hare"bell`\, n. (Bot.)
   A small, slender, branching plant ({Campanula rotundifolia}),
   having blue bell-shaped flowers; also, {Scilla nutans}, which
   has similar flowers; -- called also {bluebell}. [Written also
   {hairbell}.]

         E'en the light harebell raised its head. --Sir W. Scott
                                                  .

Source : WordNet®

harebell
     n 1: sometimes placed in genus Scilla [syn: {wild hyacinth}, {wood
          hyacinth}, {bluebell}, {Hyacinthoides nonscripta}, {Scilla
          nonscripta}]
     2: perennial of northern hemisphere with slender stems and
        bell-shaped blue flowers [syn: {bluebell}, {Campanula
        rotundifolia}]