Definitions

1. noun

A condition in which the atmospheric pressure is lower than normal, often resulting in symptoms such as dizziness, nausea, and fatigue.

“The pilot struggled with hypobarism during the ascent to high altitude.”

2. noun

A condition in which there is a deficiency or absence of oxygen in the atmosphere, often caused by high altitude or other environmental factors.

“Hypobarism is a serious concern for climbers and mountaineers, particularly those ascending to extreme altitudes.”