Dictionary

altitude sickness

noun

Definition of ALTITUDE SICKNESS

:  the effects (as headache, nausea, or swelling of the brain) of oxygen deficiency in the blood and tissues developed at high altitudes having reduced atmospheric pressure

First Known Use of ALTITUDE SICKNESS

1901

altitude sickness

noun al·ti·tude sickness \ˌal-tə-ˌt(y)üd-\   (Medical Dictionary)

Medical Definition of ALTITUDE SICKNESS

:  the effects (as nosebleed, nausea, or headache) of oxygen deficiency in the blood and tissues developed at high altitudes with reduced atmospheric pressure

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