noun Download 🔗Share An SI/MKS unit of measure, the length of one millionth of a meter. Symbols: µm, um, rm. Examples : "The scientist used a micrometer to measure the tiny speck of dust. " unit science physics technical math amount Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter. Examples : "The mechanic used a micrometer to measure the precise thickness of the car's brake rotor. " device technology machine science technical physics Chat with AIVocabulary GamePractice Reading