Source : Webster's Revised Unabridged Dictionary (1913)

Phlox \Phlox\, n. [L., a kind of flower, fr. Gr. ? flame, fr. ?
   to burn.] (Bot.)
   A genus of American herbs, having showy red, white, or purple
   flowers.

   {Phlox worm} (Zo["o]l.), the larva of an American moth
      ({Heliothis phloxiphaga}). It is destructive to phloxes.
      

   {Phlox subulata}, the moss pink. See under {Moss}.

Source : WordNet®

phlox
     n : any polemoniaceous plant of the genus Phlox; chiefly North
         American; cultivated for their clusters of flowers