Wiktionary
n. 1 Any of various sharks of the genus ''Sphyrna'' having the eyes set on projections from the sides of the head, which gives it a hammer shape. 2 A winghead shark.
WordNet
n. 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]
Wikipedia
The hammerhead sharks are a group of sharks in the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a cephalofoil. Most hammerhead species are placed in the genus Sphyrna while the winghead shark is placed in its own genus, Eusphyra. Many not necessarily mutually exclusive functions have been proposed for the cephalofoil, including sensory reception, manoeuvering, and prey manipulation. Hammerheads are found worldwide in warmer waters along coastlines and continental shelves. Unlike most sharks, hammerheads usually swim in schools during the day, becoming solitary hunters at night. Some of these schools can be found near Malpelo Island in Colombia, Cocos Island off Costa Rica, and near Molokai in Hawaii. Large schools are also seen in the waters off southern and eastern Africa.
Usage examples of "hammerhead shark".
In the middle of the plank was the stuffed head of a hammerhead shark with a rope lasso around its neck.
He pointed to the stuffed hammerhead shark sticking out the back of his pickup truck.
Zargoza, looking at a sailfish, king tarpon and hammerhead shark hanging in the middle of the room, almost completely dry.
The owners contacted charter fishermen and taxidermy shops and in three months had purchased ten stuffed hammerhead sharks, which they planted in a row behind the swimming pool.
Japanese, French and German tourists stopped and posed for pictures in front of the row of stuffed hammerhead sharks and then drove away.