# millimicron

> English word · Noun

## Definitions
1. A unit of length equal to one thousandth of a micron.

## Etymology
From milli- + micron.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/millimicron