The medical suffix term -thorax pertains to “chest” or “chest cavity” .
Example Word: pneum/o/thorax.
Word Breakdown: Pneum/o is a combining form that denotes “lungs” or “air”, and -thorax pertains to “chest” or “chest cavity”.
Definition: A pneumothorax is an accumulation of air in the pleural cavity usually caused by a lung injury or chest injury.