# Roche lobe

> English word · Noun

## Definitions
1. The teardrop-shaped region around a star in a binary system within which orbiting material is gravitationally bound to that star.

## Etymology
Named after Édouard Roche.

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