HAMMERHEAD

noun a fresh-water fish; the stone-roller.

2. hammerhead ·noun an african fruit bat (hypsignathus monstrosus);

— so called from its large blunt nozzle.

3. hammerhead ·noun a shark of the genus sphyrna or zygaena, having the eyes set on projections from the sides of the head, which gives it a hammer shape. the sphyrna zygaena is found in the north atlantic. called also hammer fish, and balance fish.