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NCI Dictionary of Cancer Terms


millimeter  listen  (MIH-luh-MEE-ter)

  A measure of length in the metric system. A millimeter is one thousandth of a meter. There are 25 millimeters in an inch.

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Millimeters; drawing shows millimeters (mm) using everyday objects. A sharp pencil point shows 1 mm, a new crayon point shows 2 mm, and a new pencil-top eraser shows 5 mm.