# retroperitoneum

> English word · Noun

## Definitions
1. The space in the abdominal cavity behind the peritoneum.

## Etymology
From retro- + peritoneum.

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