/suy'kloh oh"leuh fin, sik'loh-/ , n. Chem.
any of the homologous series of unsaturated, alicyclic hydrocarbons, as cyclooctatetraene and cyclopentadiene, containing one double bond in the ring and having the general formula C 11 H 2n-2 .
[ 1920-25; CYCLO- + OLEFIN ]