What is a "nanomaterial" according to the European Commission?

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Nanomaterials are chemical substances or materials that are manufactured and used at a very small scale (down to 10,000 times smaller than the diameter of a human hair)... more

 

What is a "nanomaterial" according to the Joint Research Center?

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The Joint Research Centre of the European Commission has released a report on the definition of the term 'nanomaterial'. The document entitled 'Considerations on a definition of nanomaterial for regulatory purposes' can be downloaded here.

 

What is a "nanomaterial" according to the ISO/IEC 80004-1 Nanotechnologies - Volabulary - Part 1 - Core terms - 2010?

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Material with any external dimension in the nanoscale (2.1) or having internal structure or surface structure in the nanoscale.
NOTE 1:This generic term is inclusive of nano-object (2.5) and nanostructured material (2.7).
NOTE 2:See also engineered nanomaterial (2.8), manufactured nanomaterial (2.9) and incidental nanomaterial (2.10).
http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=51240