Definitions
1.nounThe portion of a hammer containing the metal striking face (also including the claw or peen if so equipped).
2.nounAny of various sharks of the genus Sphyrna or Zygaena having the eyes set on projections from the sides of the head, which gives it a hammer shape.
3.nounA fresh-water fish; the stone-roller, in the minnow family Cyprinidae.
4.nounAn African fruit bat, the hammer-headed fruit bat, Hypsignathus monstrosus, so called from its large blunt nozzle.
5.nounA stupid person, a dunce.
6.nounA turn-around; a parking area constructed in a subdivision for initial access and construction.
7.nounA kind of ribozyme; hammerhead ribozyme.