# nonrebreather

> English word · Noun

## Definitions
1. A mask used in medical emergencies to deliver oxygen from a reservoir to the patient.

## Etymology
From non- + rebreather.

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