# leptin

> English word · Noun · IPA /ˈlɛptɪn/ · frequency rank #58,146

## Definitions
1. A protein hormone produced in adipose tissue; it plays a role in regulating appetite and metabolism.

## Etymology
Ancient Greek λεπτός (leptós, “thin”) + -in

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/leptin