monomolecular
adjective
mono·mo·lec·u·lar ˌmä-nə-mə-ˈle-kyə-lər 
: being only one molecule thick
a monomolecular film
monomolecularly adverb
Example Sentences
Recent Examples on the Web Worn on top of the clear bubble helmet, the visor had shades and an outer visor that was a plastic with a monomolecular layer of gold. 
Ryan W. Miller, USA TODAY, 19 July 2019
Ryan W. Miller, USA TODAY, 19 July 2019 Word History
First Known Use
1876, in the meaning defined above
Medical Definition
monomolecular
adjective
mono·mo·lec·u·lar ˌmän-ō-mə-ˈlek-yə-lər
1
: being only one molecule thick
a monomolecular film
2
: relating to or being a process whose rate is directly proportional to the amount or concentration of the material undergoing the process