\Star"fish\, n.
1. (Zo["o]l.) Any one of numerous species of echinoderms
   belonging to the class Asterioidea, in which the body is
   star-shaped and usually has five rays, though the number
   of rays varies from five to forty or more. The rays are
   often long, but are sometimes so short as to appear only
   as angles to the disklike body. Called also {sea star},
   {five-finger}, and {stellerid}.

Note: The ophiuroids are also sometimes called starfishes.
      See {Brittle star}, and {Ophiuroidea}.

2. (Zo["o]l.) The dollar fish, or butterfish.