hammerhead

noun9

1. •
   The portion of a hammer containing the metal striking face (also including the claw or peen if so equipped).
2. •
   Any organism with head shaped like that of a hammer.
3. •
   Any shark of the family Sphyrnidae, which only includes the genera Sphyrna and Zygaena, with eyes set on projections from the sides of the head.
4. •
   A hogsucker, a fresh-water fish of species Hypentelium nigricans, in the sucker family Catostomidae.
5. •
   A hammer-headed fruit bat, a fruit bat of species Hypsignathus monstrosus, with a large blunt nozzle.
6. •
   A hammerkop, a bird of species Scopus umbretta.
7. •
   (slang) A stupid person, a dunce.
8. •
   A turn-around; a parking area constructed in a subdivision for initial access and construction.
9. •
   A kind of ribozyme; hammerhead ribozyme.