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star drill[′stär ‚dril]
A tool with a star-shaped point, used for drilling in stone or masonry.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A long steel tool having a star-shaped point, used for drilling holes in concrete, masonry, and stone; it is handheld, the head being struck repeatedly with a hammer to provide the drilling action.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.