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

They found, incredibly, the cylindrical core of a diamond drill.

From Literature

The Northern Michigan Geological Repository Association in Marquette received the largest grant of $226,700 to buy a building for a diamond drill core library and geological data for research.

From Washington Times

To do it, Clinton would need a sharpened hammer or diamond drill, time, and determination.

From Slate

If these tools aren’t enough, you can also use an electric drill with a diamond drill bit.

From Slate

More technological advances, including the diamond drill, electric rail and steam shovel, ushered in a new era of industrial-scale lead mining in southeast Missouri.

From MSNBC