Definition of acute mountain sickness in English:

acute mountain sickness

noun

  • Altitude sickness, typically in a mild form with headache, nausea, and fatigue, occurring in persons who ascend too quickly to high altitude (over 2,400 metres or 8,000 feet); abbreviated AMS; compare "altitude sickness", "mountain sickness".

Origin

Early 20th century; earliest use found in Wide World Magazine.