Definition of "hypobaric" [hypobaric]

• Below normal pressure. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Roach placed his volunteers in a large metal box called a hypobaric chamber and gradually sucked out air with a vacuum pump, reducing atmospheric pressure to mimic a high altitude, low-oxygen environment."
• "The main impact of air travel is breathing in air with a reduced oxygen content - resulting in lower circulating oxygen levels in the blood-in a pressurised environment, referred to as hypobaric hypoxia, says the guidance."
• "The story I nearly wrote was about an assault on Everest in 2053, using teleoperated robots instead of human beings - the idea was that the people driving the robots would be in hypobaric chambers, to simulate the pressure drop."