nanoparticle

[ nan-oh-pahr-ti-kuh l, ney-noh- ]
/ ˈnæn oʊ pɑr tɪ kəl, ˈneɪ noʊ- /

noun

a microscopic particle of matter that is measured on the nanoscale, usually one that measures less than 100 nanometers.

Origin of nanoparticle

First recorded in 1980–85; nano- + particle

British Dictionary definitions for nanoparticle

nanoparticle
/ (ˈnænəʊˌpɑːtɪkəl) /

noun

a particle with dimensions less than 100 nanometres