Find the word definition

Wiktionary
nanoreactor

n. (context chemistry English) A nanoscale reactor, especially one used to produce nanoparticles

Wikipedia
Nanoreactor

Nanoreactors are a form of chemical reactor that are particularly in the disciplines of nanotechnology and nanobiotechnology. These special reactors are crucial in maintaining a working nanofoundry; which is essentially a foundry that manufactures products on a nanotechnological scale.