Home›Browse›M›micrometermicrometerOur editors are putting together more complete content — check back in about 20 minutesmicrometernoun · 1noun · 1micrometer — nounnoun1. a tool for measuring very small distances or objects1.nounDefinitiona tool for measuring very small distances or objectsExampleThe technician used a micrometer to measure the thickness of the wire.micrometer — nounnoun1. one millionth of a meter1.nounDefinitionone millionth of a meterExampleThe bacteria was about 2 micrometers in length.