millimeter

[ mil-uh-mee-ter ]
/ ˈmɪl əˌmi tər /

noun

a unit of length equal to one thousandth of a meter and equivalent to 0.03937 inch. Abbreviation: mm
Also especially British, mil·li·me·tre.

Origin of millimeter

From the French word millimètre, dating back to 1800–10. See milli-, meter1

Related forms

mil·li·met·ric [mil-uh-me-trik] /ˌmɪl əˈmɛ trɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Medicine definitions for millimeter

millimeter

[ mĭlə-mē′tər ]

n.

A unit of length equal to one thousandth (10-3) of a meter (0.0394 inch).
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for millimeter

millimeter

[ mĭlə-mē′tər ]

A unit of length in the metric system equal to 0.001 meter. See Table at measurement.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.