Search Dictionary
Definition of micron
micron
/ˈmaɪ.krɑːn/
mi · cron
Plural:microns
micron Lexical Profile
CEFR
B2
Grade
9
Tier
2
Usage
Top 10k
micron Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
A unit of length equal to one millionth of a meter, used largely to measure microscopic structures, wavelengths of infrared radiation, and precise manufacturing tolerances.
Example
"The diameter of a typical human hair is roughly seventy-five microns."
Synonyms
View all synonyms for micronWord Nuance & Usage
Although the official International System of Units (SI) term is 'micrometer' (symbol: μm), 'micron' remains widely preferred in everyday engineering, biology, and optical sciences.
• Rhymes for micron
• Nearby Words
Word Origin & Etymology
Late 19th century: from Greek mikron, the neuter of mikros, meaning 'small'.
Cite this Entry
Wordmom. (2026). Definition of Micron. In Wordmom Dictionary. Retrieved Oct 13, 2026, from https://wordmom.com/dictionary/micron