Nanomaterial

Material with one or more external dimensions, or an internal structure, at nanoscale and which could exhibit novel characteristics compared to the same material at a larger scale.

Source: based on SCENIHR's opinion on the  appropriateness of existing methodologies to assess the potential risks associated with engineered and adventitious products of nanotechnologies

Examples of nanomaterials include nanotubes, which are long, thin, cylinder-shaped structures of a few nanometres in diameter but with a length of up to several micrometres.

Source: GreenFacts

Source: Wikipedia Louie nanotube 

Nanometre - Nanoparticle - Nanoscale - Nanoscience - Nanostructure - Nanotechnology

Deutsch: Nanomaterialien
Español: Nanomaterial
Français: Nanomatériau

Nanosafety

Nanomaterials

Aquatic environment

Ozone layer depletion

Safety of sunscreens