Millimicron

n.

1.

The thousandth part of a micron or the millionth part of a millimeter; - a unit of length used in measuring light waves, etc.

Noun

1.

millimicron - a metric unit of length equal to one billionth of a meter Synonyms: micromillimeter, micromillimetre, nanometer, nanometre, nm

A, angstrom, angstrom unit, metric linear unit, micrometer, micromillimeter, micromillimetre, micron, nanometer, nanometre, nm