# duodenum

> English word · Noun · IPA /ˌdjuːə(ʊ)ˈdiːnəm/ · frequency rank #68,168

## Definitions
1. The first part of the small intestine, starting at the lower end of the stomach and extending to the jejunum.

## Etymology
From Medieval Latin duodēnum digitōrum (“space of twelve digits”) in reference to its length, from duodēnī (“twelve each”) + digitōrum, genitive plural of digitus (“finger; toe; digit”).

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