Nanometer

n. unit of measure equal to one billionth of a meter

A nanometre (American spelling: nanometer, symbol nm) (Greek: νάνος, nanos, dwarf; μετρώ, metrό, count) is a unit of length in the metric system, equal to one billionth of a metre, which is the current SI base unit of length. It can be written in scientific notations as 1×10−9 m (engineering notation) or (exponential notation) — both meaning .
See more at Wikipedia.org...

Noun
1. a metric unit of length equal to one billionth of a meter
(synonym) nanometre, nm, millimicron, micromillimeter, micromillimetre
(hypernym) metric linear unit
(part-holonym) micron, micrometer
(part-meronym) angstrom, angstrom unit, A

NANOMETRO

نانو متر