Definition

1. Noun:
   • A drill that removes a cylindrical core from the drill hole: A "core drill" is a specialized drilling tool designed not just to create a hole, but to extract a solid, cylindrical sample of the material being drilled through. This sample, called a core, is preserved for analysis.

Usage

• A "core drill" is used in fields like geology, mining, construction, and engineering to obtain intact samples of subsurface materials (e.g., rock, soil, concrete) for examination and testing.
• It is a compound noun. The term "core" specifies the type of sample extracted, and "drill" specifies the tool.

Examples

• Noun:
  • The geologists used a core drill to obtain samples from the bedrock.
  • Before constructing the bridge, engineers performed core drill tests on the concrete pillars to assess their strength.

Advanced Usage

• "to take a core drill": This phrase is sometimes used informally to mean the action of using a core drill to extract a sample.
  • The team needed to take a core drill of the foundation.

Variants and Related Words

• Core drilling (n): The process or activity of using a core drill.
  • Core drilling is essential for mineral exploration.
• Core sample (n): The cylindrical piece of material extracted by a core drill.
  • The core sample revealed layers of sedimentary rock.
• Core barrel (n): The part of a core drill that holds the extracted core.
  • They removed the core barrel to retrieve the sample.

Synonyms

• Boring tool (general): A tool for making holes.
• Sampling drill: A drill designed to collect samples (this is a descriptive synonym, not a single common word).

Notes

• "Core drill" is a specific technical term. In casual conversation, people might simply refer to "drilling for samples." The compound term itself is not typically broken into phrasal verbs or idioms.

Noun

1. a drill that removes a cylindrical core from the drill hole