rock drill


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rock drill

[′räk ‚dril]
(mechanical engineering)
A machine for boring relatively short holes in rock for blasting purposes; motive power may be compressed air, steam, or electricity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

rock drill

A machine or device for drilling a hole in rock so that it may be blasted; usually driven by compressed air, but also may be driven by electricity or by steam.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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