counterbore

Definition from Wiktionary, a free dictionary

Contents 1 English 1.1 Etymology 1.2 Noun 1.3 Verb 1.4 See also

[edit] English

[edit] Etymology

From counter- (“‘against’”) + bore (“‘hole’”)

[edit] Noun

counterbore (plural counterbores)

1. A cylindrical recess, typically machined around a hole to admit a screw so that it sits flush with a surface.
2. The tool with which a counterbore is machined.

[edit] Verb

to counterbore (third-person singular simple present counterbores, present participle counterboring, simple past and past participle counterbored)

1. (transitive) To create such a cylindrical recess.

[edit] See also

• countersink
• spotface