This Technical Specification provides a terminology for products and systems reliant on nanomaterials for their essential functionalities and exhibiting photonic properties. It is intended to facilitate communications between organizations and individuals in industry and those who interact with them. Fast moving technology fields generate a multiplicity of new scientific and technical terms often with ambiguous definitions. Therefore, this Technical Specification contains a list of terms and definitions which technicians and scientists in the field of nanotechnologies need to achieve a unique and common understanding. The responsible committee is DKE/K 141 "Nanotechnologie" ("Nanotechnology") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.