The cutting or boring component of a drill that actually contacts and removes material.
Compound word from 'drill' (Old French 'drille') and 'bit' (from Old English 'bite,' meaning a piece or cutting edge). Combined in industrial terminology during the 19th-20th centuries.
Modern drillbits are engineering marvels—diamond-coated bits can drill through rock thousands of feet deep, and they need to be replaced constantly because they wear down, making them one of the hidden costs of oil and mining operations.
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