A type of organic chemical compound containing a cyclic (ring-shaped) structure with one or more carbon-carbon double bonds.
From cyclo- (circle, ring structure) + olefin (unsaturated hydrocarbon with double bonds). This polymer chemistry term emerged in the late 20th century as new plastics were developed.
Cycloolefins are used in camera lenses, lab equipment, and medical devices because they're incredibly clear and transparent—they've made better optical instruments possible.
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