micron
nounUK /ˈmaɪ.krɒn/
US /ˈmaɪ.krɑːn/
A micron is a very tiny unit used to measure length, equal to one millionth of a meter.
The dust particle was only a few microns wide.
RELATED WORDS
OTHER MEANINGS
2. A unit of length equal to one thousandth of a millimeter, used in science and engineering.
Bacteria are often between one and ten microns in size.
3. A symbol or mark used in ancient Greek writing to indicate a short vowel or a change in pronunciation.
The scribe added a micron above the vowel.
4. A tiny particle or speck too small to see without magnification.
The air filter catches microns of dust.