The definition of nanotoxicology as a discipline should include keywords identified throughout its existence, except for words related to the methodological apparatus. As a result, the list of most essential keywords can be narrowed to anti-bacterial agents, antineoplastic agents, biocompatible materials, cytotoxicity, response relationship, drug carriers, drug delivery, liposomes, nanoparticles, micelles, nanomedicine, nanoparticles, nanostructures, risk assessment, theranostic nanomedicine. Unexpectedly for us, theranostic nanomedicine has been associated with the search term for nanotoxicology over the past decade.