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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.

utual attraction of oppositely electrified surfaces. Knight. -- Balance fish. (Zoöl) See Hammerhead. -- Balance knife, a carving or table knife the handle of which overbalances the blade, and so keeps it from contact with the table. -- Balance of power. (Politics), such an adjustment of power among sovereign states…

d air. -- Drop hammer, Face hammer, etc. See under Drop, Face, etc. -- Hammer fish. See Hammerhead. -- Hammer hardening, the process of hardening metal by hammering it when cold. -- Hammer shell (Zoöl.), any species of Malleus, a genus of marine bivalve shells, allied to the pearl oysters, having the wings narrow a…

dfish, Notidanian, and Tope. -- Gray shark, the sand shark. -- Hammer-headed shark. See Hammerhead. -- Port Jackson shark. See Cestraciont. -- Shark barrow, the eggcase of a shark; a sea purse. -- Shark ray. Same as Angel fish (a), under Angel. -- Thrasher shark, or Thresher shark, a large, voracious shark. See T…

A shark (Sphryna tiburio) allied to the hammerhead, and native of the warmer parts of the Atlantic and Pacific oceans; -- called also bonnet shark.