phlox \phlox\ (fl[o^]ks), n. [L., a kind of flower, fr. Gr. flo`x flame, fr. fle`gein to burn.] (Bot.) A genus of American herbs, having showy red, white, or purple flowers. [1913 Webster] {Phlox worm} (Zool.), the larva of an American moth ({Heliothis phloxiphaga}). It is destructive to phloxes. {Phlox subulata}, the moss pink. See under {Moss}. [1913 Webster]