[ lep-tin ]
/ ˈlɛp tɪn /


a hormone that is thought to suppress appetite and speed up metabolism.

Origin of leptin

1995–2000; < Greek leptós small, thin + -in2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for leptin


/ (ˈlɛptɪn) /


a protein, produced by fat cells in the body, that acts on the brain to regulate the amount of additional fat laid down in the body

Word Origin for leptin

C20: from lepto- + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for leptin


[ lĕptĭn′ ]

A peptide hormone and neurotransmitter produced by fat cells and involved in the regulation of appetite.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.