The Collaborative International Dictionary of English v.0.48:

Asteraceae \Asteraceae\ n.
   1. a family of plants with heads composed of many florets,
      including the aster; daisy; dandelion; goldenrod;
      marigold; lettuces; ragweed; sunflower; thistle; zinnia.

   Syn: Compositae, family Compositae, family Asteraceae,
        aster family
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Asteraceae
    n 1: plants with heads composed of many florets: aster; daisy;
         dandelion; goldenrod; marigold; lettuces; ragweed;
         sunflower; thistle; zinnia [syn: Compositae, family
         Compositae, Asteraceae, family Asteraceae, aster
         family]