polycondensation

noun

poly·​con·​den·​sa·​tion ˌpä-lē-ˌkän-ˌden-ˈsā-shən 

-dən-

: a chemical condensation leading to the formation of a compound of high molecular weight

Word History

Etymology

borrowed from German Polykondensation, from poly- poly- + Kondensation condensation

First Known Use

1936, in the meaning defined above