(chemistry) The process of cyclizing, of becoming or causing to become aromatic.
1936, Aristid V. Grosse, "Dehydrogenation of Hydrocarbons", US Patent 2148129 http://www.google.com/patents?id=leFGAAAAEBAJ, page 1:"The dehydrogenation reactions may involve isomerization and cyclization as well as the formation of olefins and unsaturated compounds generally."
1962, Rudolph J. Angelo, "Linearly Fused Polycyclic Polymers and Process", US Patent 3245974 http://www.google.com/patents?id=CTplAAAAEBAJ, page 2 col. 5:"It is convenient to run the cyclizations at a temperature between 25° C. and 100° C."