From Longman Dictionary of Contemporary Englishnanotechnologynan‧o‧tech‧nol‧o‧gy /ˌnænəʊtekˈnɒlədʒi $ -noʊtekˈnɑː-/ noun [uncountable] technical a science which involves developing and making extremely small but very powerful machinesFrom Longman Business Dictionarynanotechnologynan‧o‧tech‧nol‧o‧gy /ˌnænəʊtekˈnɒlədʒi-noʊtek- ˈnɑː-/ noun [uncountable] a science that combines technology and chemistry to build things from atomsNanotechnology could create a new generation of computer components.