millimeter

American  

[mil-uh-mee-ter] / ˈmɪl əˌmi tər /

especially British, millimetre

noun

1. a unit of length equal to one thousandth of a meter and equivalent to 0.03937 inch. mm

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millimeter Scientific  

/ mĭl′ə-mē′tər /

1. A unit of length in the metric system equal to 0.001 meter.

2. See Table at measurement

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Other Word Forms

• millimetric adjective

Etymology

Origin of millimeter

First recorded in 1800–10; from French millimètre; milli-, meter ¹

Example Sentences

Wrinkle structures are tiny ridges and pits ranging from millimeters to centimeters across.

From Science Daily

The system can measure movements as small as a few millimeters caused by slow geological processes such as landslides or ground subsidence.

From Science Daily

For scale, a nanometer is one millionth of a millimeter.

From Science Daily

Only Jonah was in a position to see that she didn’t actually touch it, that she kept a millimeter of air between her fingertips and the rock.

From Literature

The organoids measured several millimeters across and were mature enough to sustain and model traumatic damage.

From Science Daily