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jackhammer

 - 2 dictionary results

jack⋅ham⋅mer

[jak-ham-er]
–noun
a portable drill operated by compressed air and used to drill rock, break up pavement, etc.

Origin:
1925–30, Americanism; jack 1 + hammer
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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jack·ham·mer   (jāk'hām'ər)   
n.  A hand-held machine for drilling rock and breaking up pavement, operated by compressed air.
jack'ham'mer v.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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