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Glossary: millimeter, Masonic Cancer Center, University of Minnesota



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

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.

Millimeters (mm). A sharp pencil point is about 1 mm, a new crayon point is about 2 mm, and a new pencil eraser is about 5 mm.