1. Containing a closed ring of atoms of which at least one is not a carbon atom
   "Heterocyclic compounds are common in many pharmaceuticals"

1. A compound containing a heterocyclic ring
   "Many pharmaceutical drugs are based on heterocyclic compounds";
   - heterocyclic compound, heterocycle

Derived forms: heterocyclics

See also: cyclic

Type of: chemical compound, compound

Encyclopedia: Heterocyclic