Hydrocarbons having two or more rings connected in the manner of links of a chain, without a
covalent bond. More generally, the class catena compounds embraces functional derivatives and hetero analogues, e.g:
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995))
on page 1327
