Open main menu

Micrometre

one millionth of a metre

A micrometre (the American spelling is micrometer; symbol is ┬Ám) is a unit of length in the SI measurement system. It can also be called a micron. It is one millionth of a metre.

A micrometre is often used as a measurement for cells like bacteria, because bacteria are very small too.

A micron is very small.