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adj. Containing more than one kind of atom joined in a ring.

adj. Having one or more atoms other than carbon in at least one of its rings.

n. A heterocycle

In chem., of a substance the molecule is believed to consist of a ring or continuous chain of atoms, containing in such a ring atoms of more than a single element. Thus the molecule of pyridine consists of a ring of six atoms consecutively united with each other, five of these atoms being of carbon and one of nitrogen (each carbon atom having also a hydrogen atom attached to it)—thus:

n. a compound containing a heterocyclic ring

adj. containing a closed ring of atoms of which at least one is not a carbon atom

"Cooking meats with charcoal or gas grills can cause the formation of compounds called heterocyclic amines (HCAs) and polycyclic aromatic hydrocarbons (PAHs)."

cyclic   

purine    alkaloid    dioxin    azole    furan    anthocyanin    flavone   

heterocycle   

nonnitrogenous    polycyclic    sympathomimetic    five-membered    unsaturated    tropolone    electrophilic    albuminous    non-polar    carbon-based