• WordNet 3.6
    • n hammerhead medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous
    • n hammerhead the striking part of a hammer
    • n hammerhead a stupid person; these words are used to express a low opinion of someone's intelligence
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Webster's Revised Unabridged Dictionary
  • Interesting fact: Many sharks lay eggs, but hammerheads give birth to live babies that look like very small duplicates of their parents. Young hammerheads are usually born headfirst, with the tip of their hammer-shaped head folded backward to make them more streamlined for birth.
    • Hammerhead (Zoöl) A fresh-water fish; the stone-roller.
    • Hammerhead (Zoöl) 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.
    • Hammerhead (Zoöl) An African fruit bat (Hypsignathus monstrosus); -- so called from its large blunt nozzle.
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Century Dictionary and Cyclopedia
    • n hammerhead A shark of the family Sphyrnidæ or Zygœnidæ: so called from the great lateral expansion of the head. There are 3 genera and 5 species, inhabiting most seas. The common species is Sphyrna zygœna, better known as Zygœna malleus, a cosmopolitan species which attains a length of from 12 to 15 feet. Those with the head less hammer-like belong to the genus Reniceps, and are commonly called shovelheads.
    • n hammerhead 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 hammerhead The umber or shadow-bird, Scopus umbretta.
    • n hammerhead In pianoforte-making, the padded projection of the hammer which strikes against the string.
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Chambers's Twentieth Century Dictionary
    • Hammerhead a rapacious fish of the shark family—from the shape of its head
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Chambers's Twentieth Century Dictionary
A.S. hamor; Ger. hammer, Ice. hamarr.


In literature:

A hammerhead's nest on one of the trees was fully four feet high.
"The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868" by David Livingstone
That was Tamar the Hammerhead's life's work.
"Letters from France" by C. E. W. Bean
A vicious-looking hammerhead shark was zeroing in, directly behind his friend!
"Tom Swift and the Electronic Hydrolung" by Victor Appleton
The doctor had already started for his evening's dissipation, if dining with Professor Hammerhead could be thus described.
"Parkhurst Boys" by Talbot Baines Reed
The topes and hammerheads belong to the same shark family.
"Fast Nine" by Alan Douglas

In news:

A scalloped hammerhead shark .
New species of hammerhead shark confirmed.
The saying "Everything tastes better with bacon" was put to the test as Hammerheads Restaurant was ultimately crowned the "Bacon King" for the second consecutive year.
Customs inspectors have found nearly a half ton (421 kilos) of shark fins cut illegally from protected hammerhead sharks.
Bradenton Marauders outfielder Mel Rojas, Jr, waits for a pitch from the Hammerheads' Rob Rasmussen during Monday's game at McKechnie Field in Bradenton.
A HALF-DOZEN hammerhead sharks came straight at us when we dropped to about 20 feet below the surface.
Outdoors Tiger shark , hammerhead prohibitions start Jan 1.
The recreational and commercial harvest of tiger shark s and smooth, scalloped and great hammerhead sharks will be prohibited in Florida state waters beginning Jan 1.
Harvesting of great hammerhead sharks will be banned in Florida waters starting Jan 1.
Shark born in tank without contact with male hammerhead sperm.
A hammerhead shark swims in a large tank at the Georgia Aquarium.
Big Hammerhead Tops 28th OC Shark Tourney.
Covino said the aquarium 's 12 hands-on exhibits, which include hammerhead and bamboo sharks, manta rays, starfish and more, are unprecedented in the aquarium world.
Wilmington Hammerheads Head Coach David Irving has extended an invitation to college athletes alike in the local and surrounding areas to attend his first of three Hammerheads combines for the upcoming season located in Wilmington.
This is one of the rare Great Hammerhead Sharks residing at the Adventure Aquarium in Camden, NJ.