https://doi.org/10.1351/goldbook.P04751
Saturated or unsaturated, respectively, polycyclic hydrocarbons consisting of fused five-membered rings, commonly but not necessarily incorporating the skeleton of quinacene (tricyclo[5.2.1.04,10]deca-2,5,8-triene): E.g.
bicyclo[3.3.0]octane, dodecahedrane.
