- 1. n. A flat-bottomed cylindrical enlargement of the mouth of a hole, usually of slight depth, as for receiving a cylindrical screw head. Source: opted
- 2. n. 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. Source: opted
- 3. v. t. To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore. Source: opted
- 4. n. a bit for enlarging the upper part of a hole Source: wordnet
- 5. 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. To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore. Source: webster
- 6. To form a counterbore in, by boring, turning, or drilling; toenlarge, as a hole, by means of a counterbore. Source: adambom
- 7. n a bit for enlarging the upper part of a hole Source: ecdict
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counterbore
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holecylindricalenlargingflat-bottomedmouthboringdrillingformmeansturningaxisbitcuttingdepthdrilledgeedgesenlargeenlargementformingheadkindnormalpart
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