millimeter definition

  • noun:
    • A unit of length equal to one thousandth (10-3) of a meter, or 0.0394 inches. See Table at dimension.
    • United States spelling of millimetre.
    • A lineal measure within the metric system, containing the thousandth part of a meter; equal to .03937 of an inch. See 3d meter.
    • The thousandth element of a meter, corresponding to 0.03937 inch, or nearly inch. It's denoted by mm.: as, 25.4 mm. is 1 inches.
    • a metric device of length corresponding to one thousandth of a meter

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