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

  • n. A peptide hormone neurotransmitter produced by fat cells and involved in the regulation of appetite.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A protein hormone produced in adipose tissue; it plays a role in regulating appetite and metabolism.


Ancient Greek λεπτός ("thin") + -in (Wiktionary)



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