Akademik

millimeter
One-thousandth of a meter.

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mil·li·me·ter or chiefly Brit mil·li·me·tre 'mil-ə-.mēt-ər n one thousandth of a meter abbr. mm

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mil·li·me·ter (mm) (milґĭ-me″tər) a unit of linear measure, being one thousandth (10−3) of a meter.

Medical dictionary. 2011.