1. a precision instrument used to measure very small distances or thicknesses
2. a unit of length equal to one millionth of a meter
Usage: scientific

Examples

• The machinist used a micrometer to measure the thickness of the metal sheet.
• She adjusted the micrometer carefully to get an accurate reading.
• The diameter of the wire was measured to be 0.5 millimeters using a micrometer.
• Bacteria are typically measured in micrometers.
• The cell was only 10 micrometers in diameter.
• A micrometer is essential for precision engineering work.