diamond drill

noun

1. a drill having a hollow, cylindrical bit set with diamonds, used for obtaining cores of rock samples.

Word History and Origins

Origin of diamond drill¹

First recorded in 1820–30

Example Sentences

For commercial work, a diamond drill is often used, but this is scarcely necessary for the occasional work of a laboratory.

From Project Gutenberg

The dangerous reef in the estuary of the Tees is in course of removal by means of the diamond drill.

From Project Gutenberg

A diamond drill is a most useful adjunct to exploration of a mine or deposit.

From Project Gutenberg

The diamond drill does better work in hard strata than it does in soft.

From Project Gutenberg

"It is a diamond drill, and strikes a bonanza on the lower level," said Carlin.

From Project Gutenberg