AIR BLADDER as NOUN

1. Meaning
   • an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
   Synonym(s)
   • swim bladder (what does swim bladder mean?)
   Hypernyms(s) air bladder is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
   • sac (what does sac mean?)