1. A ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon
   "Pyridine is an example of a heterocycle containing nitrogen";
   - heterocyclic ring
    
2. A compound containing a heterocyclic ring
   "Many pharmaceutical drugs are based on heterocycle compounds";
   - heterocyclic compound, heterocyclic

Derived forms: heterocycles

Type of: chemical compound, closed chain, compound, ring

Encyclopedia: Heterocycle