1) Cyclic 2) Isocyclic 1) Isocyclic 
(ho″mo-sik´lik) (-si´klik) having or pertaining to a closed chain or ring formation that contains only atoms of the same element.
[adj] - containing a closed ring of atoms of the same kind especially carbon atoms
isocyclic adjective containing a closed ring of atoms of the same kind especially carbon atoms
of or noting a cyclic compound having atoms of only one element, usually carbon, in the ring (contrasted with heterocyclic).