English

nanoparticle

From nano- + particle.

Ancient Greek νᾶνος ‘dwarf’

Latin nānus ‘dwarf’

English nano-

Proto-Italic *partis ‘part’

Latin pars ‘part, piece’

Latin particula ‘small part, particle’

Middle French particule

Today it means

noun Any microscopic particle less than about 100 nanometers (nm) in diameter.

Language periods are conventional ranges, not dates for this word.

Etymograph / nanoparticle