nanometre

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

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

<unit> 10^-9 metres; one thousand millionth part of a metre.
The wavelength of visible light and dimensions in nanotechnology are typically measured in nanometres.
(2003-05-02)