Source : Webster's Revised Unabridged Dictionary (1913)

Angler \An"gler\, n.
   1. One who angles.

   2. (Zo["o]l.) A fish ({Lophius piscatorius}), of Europe and
      America, having a large, broad, and depressed head, with
      the mouth very large. Peculiar appendages on the head are
      said to be used to entice fishes within reach. Called also
      {fishing frog}, {frogfish}, {toadfish}, {goosefish},
      {allmouth}, {monkfish}, etc.