noun (plural hammerheads)
- (Zoology) A shark of the genus Sphyrna or Zygí¦na, having the eyes set on projections from the sides of the head, which gives it a hammer shape. The Sphyrna zygí¦na is found in the North Atlantic. Called also hammer fish, and balance fish.
- (Zoology) A fresh-water fish; the stone-roller in the minnow family Cyprinidae.
- (Zoology) An African fruit bat Hypsignathus monstrosus -- so called from its large blunt nozzle.
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Full Definition of hammerhead