borehole
/ˈbɔrˌhoʊl/
noun
- A deep, narrow hole drilled into the ground to find or extract water, oil, gas, or to study the earth.
- The town's main water supply comes from a borehole that reaches an underground aquifer.
- The farmers hired a company to drill a borehole so they could water their crops.
- Scientists lowered a camera into the borehole to examine the rock layers.
Synonyms