cyclodiene

[ sahy-kluh-dahy-een, -dahy-een ]
/ ˌsaɪ kləˈdaɪ in, -daɪˈin /

noun Chemistry.

any of several organic chemicals having a chlorinated methylene group bonded to two carbon atoms of a 6-membered carbon ring, used commercially in insecticides.

Origin of cyclodiene

First recorded in 1940–45; cyclo- + diene