Wiktionary
polyquinane
n. (context chemistry English) Any polycyclic saturated hydrocarbon consisting of fused five-membered rings.
Wikipedia
Polyquinane
A polyquinane or polyquinene is a saturated or unsaturated, respectively, polycyclic hydrocarbon consisting of fused five-membered rings. The simplest member is the bicyclic compound bicyclo[3.3.0]octane. Other members are triquinacene and dodecahedrane.