Kekulean adjective2 •Of or relating to August Kekulé (1829–1896), German organic chemist, the principal founder of the theory of chemical structure. •Pertaining to the system of structural formulae devised by Kekulé, especially the structure of benzene molecules.A Kekuléan benzenoid system possesses Kekulé structures (K > 0). — 1992 formsmore Kekulean · more Kekuléan · most Kekulean · most Kekuléan