drillcore
nounUK /ˈdrɪl.kɔː/
US /ˈdrɪl.kɔːr/
A long tube of rock that comes up when you drill deep into the ground.
The scientists studied the drillcore to learn what the ground was made of.
OTHER MEANINGS
2. A cylindrical piece of ice drilled from a glacier for study.
The ice drillcore showed layers from thousands of years ago.
3. A sample of soil or sediment taken with a hollow drill.
They pulled a drillcore from the lakebed to study old mud.
4. The solid rock left inside a drill pipe after drilling.
The drillcore was carefully labeled and sent to the lab.