from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The head of a hammer.
  • n. Any of several predatory sharks of the genus Sphyrna, having the sides of the head elongated into fleshy extensions with the eyes at the ends.
  • n. A wading bird (Scopus umbretta) of Africa and southwest Asia, having brown plumage, a large bladelike bill, and a long backward-pointing crest. Also called hammerkop, umbrette.
  • n. An African fruit bat (Hypsignathus monstrosus), the male of which has a distinctive enlarged head.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The portion of a hammer containing the metal striking face (also including the claw or peen if so equipped).
  • n. Any 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.
  • n. A fresh-water fish; the stone-roller, in the minnow family Cyprinidae.
  • n. An African fruit bat, the hammer-headed fruit bat, Hypsignathus monstrosus, so called from its large blunt nozzle.
  • n. A stupid person, a dunce.
  • n. A kind of ribozyme; Hammerhead ribozyme.

from the GNU version of the Collaborative International Dictionary of English

  • n. A shark of the genus Sphyrna or Zygæna, having the eyes set on projections from the sides of the head, which gives it a hammer shape. The Sphyrna zygæna is found in the North Atlantic. Called also hammer fish, and balance fish.
  • n. A fresh-water fish; the stone-roller.
  • n. An African fruit bat (Hypsignathus monstrosus); -- so called from its large blunt nozzle.

from The Century Dictionary and Cyclopedia

  • n. A shark of the family Sphyrnidæ or Zygœnidæ: so called from the great lateral expansion of the head.
  • n. A catostomine fish, Hypentelium nigricans, having a peculiarly shaped head, which is flat above and transversely concave between the eyes, while the snout is abruptly turned down. It abounds in the fresh waters of the United States, from New York to Kansas and Alabama. It sometimes attains a length of two feet. Other names are hogsucker, stone-roller, and crawl-a-bottom.
  • n. The umber or shadow-bird, Scopus umbretta.
  • n. In pianoforte-making, the padded projection of the hammer which strikes against the string.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous
  • n. a stupid person; these words are used to express a low opinion of someone's intelligence
  • n. the striking part of a hammer


hammer +‎ head (Wiktionary)


  • Aquaman comes across more thugs, but this time, when he calls a hammerhead shark to help, it he who is the on the receiving end of its wrath: ...

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  • By designing special enzymes called hammerhead ribozymes, the researchers were able to target a so-called

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  • The viroids that Sanjuán and his colleagues studied contain a stretch of RNA called a hammerhead enzyme that speeds up the viroid's duplication in an enzymelike way.

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  • By designing special enzymes called hammerhead ribozymes, the researchers were able to target a so-called "late" gene that releases its protein product relatively late after infection.

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  • It's nice that these researchers do this kind of research - but when they ignore what the sharks feed on and how they hunt it leads to such garbage results like "the hammerhead is the shape it is because of binocular vision" - latest science and technology news stories

  • This is a classic "hammerhead" circulation that is pulling a relatively small portion of the WOM eastward to the Florida continental shelf edge and perhaps northward towards the northern eddy.


  • In many of the larger centres, large yellow "hammerhead" Cranes dotted the skyline. TravelStream™ — Recent Entries at

  • The "hammerhead" part of the auto safety should go to the rear, or away from the arm of the ejector.

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  • There are several naturally occurring catalytic RNAs including 'hammerhead', 'hairpin' Genomics and molecular biological and 'hepatitis delta virus' introns and the RNA approaches subunit of RNAase P (Khan and Lal, 2003).

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  • He added, "We believe this corridor is also used by other endangered species, such as hammerhead sharks and would benefit many other threatened marine species."

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