Source : Webster's Revised Unabridged Dictionary (1913)

Compositae \Com*pos"i*t[ae]\, n. pl. [NL., from L. compositus
   made up of parts. See {Composite}.] (Bot.)
   A large family of dicotyledonous plants, having their flowers
   arranged in dense heads of many small florets and their
   anthers united in a tube. The daisy, dandelion, and asters,
   are examples.

Source : WordNet®

Compositae
     n : plants with heads composed of many florets: aster; daisy;
         dandelion; goldenrod; marigold; lettuces; ragweed;
         sunflower; thistle; zinnia [syn: {family Compositae}, {Asteraceae},
          {family Asteraceae}, {aster family}]