English dictionary

millimicron

/'m/I/l/@/,m/aI/kr/A/n/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

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

noun.quantity

Synonyms micromillimeter micromillimetre nanometer nanometre nm

Source: WordNet 3.0
The thousandish part of a micron or the millionth part of a millimeter; -- a unit of length used in measuring light waves, etc.

noun

Source: webster1913