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diamond drill

noun

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


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Word History and Origins

Origin of diamond drill1

First recorded in 1820–30
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Example Sentences

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

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

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

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

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

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diamond birddiamond dust