Source : Webster's Revised Unabridged Dictionary (1913)

Pliers \Pli"ers\, n. pl. [From {Ply} to bend, fold.]
   A kind of small pinchers with long jaws, -- used for bending
   or cutting metal rods or wire, for handling small objects
   such as the parts of a watch, etc.

Source : WordNet®

pliers
     n : a gripping hand tool with two hinged arms and (usually)
         serrated jaws [syn: {pair of pliers}, {plyers}]