# pneumothorax

> English word · Noun · IPA /ˈnjuː.məʊˌθɔ.ɹæks/ · frequency rank #61,713

## Definitions
1. Presence of air inside the pleural cavity, usually caused by injury either to the lung or the chest wall.

## Etymology
From pneumo- + thorax.

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