Particle with one or more dimensions of the order of about 100 millionth of a millimetre (100 nm) or less.
(Note: In the SCENIHR
Source: GreenFacts
Nanomaterial - Nanometre - Nanoscale - Nanoscience - Nanostructure - Nanotechnology
Deutsch: Nanopartikel
Español: Nanopartícula
Français: Nanoparticule