Source : Webster's Revised Unabridged Dictionary (1913)

Bluets \Blu"ets\, n. [F. bluet, bleuet, dim. of bleu blue. See
   {Blue}, a.] (Bot.)
   A name given to several different species of plants having
   blue flowers, as the {Houstonia c[oe]rulea}, the {Centaurea
   cyanus} or bluebottle, and the {Vaccinium angustifolium}.

Source : WordNet®

Vaccinium angustifolium
     n : low-growing deciduous shrub of northeastern North America
         having flowers in compact racemes and bearing sweet dark
         blue berries [syn: {low-bush blueberry}, {low blueberry},
          {Vaccinium pennsylvanicum}]