1) Metric linear unit 2) Micromillimeter 3) Micromillimetre 4) Millimicron 5) Nanometre 1) Micromillimeter 2) Micromillimetre 3) Millimicron 4) Nanometre 5) Nm 
(nm) A unit of length, equal to 10-9 meters, and equal to 10 Å (Angstroms). 
One billionth (10-9) of a meter. The most common unit used for characterizing the wavelength of light in visual science.
A measure of length in the metric system. A nanometer is one billionth of a meter. An average human hair is about 60,000 nanometers thick. Nanometers are used to measure wavelengths of light and distances between atoms in molecules.
(nm) One billionth of a meter (10-9 or 0.000000001 m) or ten angstroms.
(nm) One billionth (10-9) of a meter. A sheet of paper is about 100,000 nanometers thick. See also nanotechnology.
One-billionth of a meter (10-9 m). ... Abbreviation: nm ... (05 Mar 2000) ... 
(nm) (nan´o-me″tәr) one billionth (10−9) of a meter.
Is a unit of measurement of light wavelength. A nanometer is one million of a millimeter
One billionith of a meter
One trillionth of a metre, or 10-9 (abbreviated hm); a unit used to measure viruses or individual features of microbial cells.
This measurement used to describe a nanofiber refers to 1 billionth of a meter, or 1 x 10-8 centimeter. 150,000 strands of a nanofiber can fit across a human hair.
(nm) A unit of length equal to 10-9 m. Abbreviated nm. Commonly used unit to define wavelength of light, particularly in the UV and visible ranges of the electromagnetic spectrum.
(nm) Type: Term Pronunciation: nă-nom′ĕ-tĕr Definitions: 1. One billionth of a meter (10−9 m).
Is a unit of measurement of light wavelength. A nanometer is one million of a millimeter. 
n. A unit of measure; one millionth (10-9) of a meter.
One-millionth of a millimeter.
[n] - a metric unit of length equal to one billionth of a meter
nanometer A unit of length which is equal to one-billionth (10-9) of a meter.
One billionth of a meter.
nanometre noun a metric unit of length equal to one billionth of a meter
(nm) Unit of length equal to 10-9 of a meter.
one billionth of a meter. Abbr.: nm&hasp;&hasp; Cf.
(nm) Unit of measure equal to one millionth of a millimeter. Wavelengths are measured in nanometers.