COUNTERBORES

Noun

counterbores

plural of counterbore

Source: Wiktionary

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COUNTERBORE

Coun"ter*bore` (-br`), 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.

Coun`ter*bore" (koun`tr-br"), v. t.

Definition: To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.

COUNTERBORE

Coun"ter*bore` (-br`), 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.

Coun`ter*bore" (koun`tr-br"), v. t.

Definition: To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.

Source: Webster’s Unabridged Dictionary 1913 Edition

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