micron

noun

A unit of length equal to one thousandth (10−3) of a millimeter or one millionth (10−6) of a meter.

noun

The millionth part of a meter, or of an English inch.

noun

A measure of length; the thousandth part of one millimeter; the millionth part of a meter.

noun

A unit of length; the thousandth part of one millimeter; the millionth part of a meter.

noun

a metric unit of length equal to one millionth of a meter