Cyclic compounds in which all of the ring members are carbon atoms, e.g. 1,2-dihydronaphthalene.
See also:
homocyclic compounds
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1325 [Terms] [Paper]