noun🔗Share毫米 An SI/MKS unit of measure, the length of 1/1000 of a meter. Symbol: mm"The carpenter carefully measured the wood, marking a line every millimeter to ensure a precise fit. "木匠小心翼翼地测量木材,每隔一毫米就画一条线,以确保严丝合缝。unitmathsciencetechnicalChat with AIVocabulary GamePractice Reading