A :B :C :D :E :F :G :H :I :J :K :L :M :N :O :P :Q :R :S :T :U :V :W :X :Y :Z :


Heterocyclic

A type of organic compound in which the characteristic chemical groups are linked in a closed ring structure and in which one or more atoms in the ring is an element other than carbon, e.g., silica, sulfur, nitrogen, etc.

See Also: Organic Aromatic Organic Aliphatic