micrometer
/ˈmaɪkroʊˌmitər/
noun
- A unit of length equal to one millionth of a meter, used to measure very small distances.
- The bacteria measured just 2 micrometers in diameter.
- Engineers use micrometers to ensure precise manufacturing tolerances.
- A human hair is about 70 micrometers thick.
- A tool used for measuring very small distances or thicknesses, often with a screw mechanism.
- The machinist used a micrometer to check the thickness of the metal sheet.
- A digital micrometer gives measurements to the nearest thousandth of a millimeter.
- She adjusted the micrometer carefully to get an accurate reading.