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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An atom other than carbon in the structure of a heterocyclic compound.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any atom in a heterocyclic ring (or other structure normally built of carbon atoms) that is not a carbon atom.


From hetero- +‎ atom. (Wiktionary)



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