hammerhead shark 
medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous • Syn: hammerhead • Hypernyms: shark • Hyponyms: smooth hammerhead, Sphyrna zygaena, smalleye hammerhead, Sphyrna tudes, shovelhead, bonnethead, bonnet shark, Sphyrna tiburo • Member Holonyms: Sphyrna, genus Sphyrna
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