Coun`ter`bore´ (koun`t?r-b?r´)
| n. | 1. | A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head. |
| 2. | A kind of pin drill with the cutting edge or edges normal to the axis; - used for enlarging a hole, or for forming a flat-bottomed recess at its mouth. | |
| v. t. | 1. | To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  counterbore - a bit for enlarging the upper part of a holebit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit" |
Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|