swim bladder

2 definitions found

swim bladder - Collaborative International Dictionary of English v.0.48 :

  Swim \Swim\, n.
     1. The act of swimming; a gliding motion, like that of one
        swimming. --B. Jonson.
        [1913 Webster]
  
     2. The sound, or air bladder, of a fish.
        [1913 Webster]
  
     3. A part of a stream much frequented by fish. [Eng.]
        [1913 Webster]
  
     Swim bladder, an air bladder of a fish.
  
     To be in the swim, to be in a favored position; to be
        associated with others in active affairs. [Colloq.]
        [1913 Webster]

swim bladder - WordNet (r) 2.1 (2005) :

  swim bladder
      n 1: an air-filled sac near the spinal column in many fishes
           that helps maintain buoyancy [syn: air bladder, swim bladder
           , float]