Jackhammer

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  jackhammer \jackhammer\ n.
     a hammer having a strong steel cutting blade, driven by
     compressed air in multiple rapid strokes, and used for
     cutting through pavement, concrete, or other hard substances.
  
     Syn: air hammer, pneumatic hammer.


          [WordNet 1.5]

From WordNet (r) 2.0 [wn]:

  jackhammer
       n : a hammer driven by compressed air [syn: {air hammer}, {pneumatic
           hammer}]