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Below normal pressure.

hy′po·bar′ism n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


having less than normal pressure
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌhaɪ pəˈbær ɪk)

(of an anesthetic) having a specific gravity lower than that of cerebrospinal fluid.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Two rats were subjected to 10 cycles of intermittent hypobaric hypoxic (IHH) of 96 h (~428 torr, P[O.sub.2] 90 mm Hg), followed by 96 h of normobaric normoxia, for 80 days.
The facility houses the UK's only hypobaric testing equipment, which enables precise vehicle powertrain altitude testing, as part of a complete development solution for the automotive industry.
Dietary L-Carnitine Supplement Counteracts Pulmonary Hypertensive Response in Broiler Chickens Fed Reduced-Protein Diets and Subjected to Cool Condition and Hypobaric Hypoxia.
SPC Rampona's military education includes the Special Electronic Aircraft Course, Special Survival Skills Course (SV-38), and hypobaric chamber training.
Abellan R., Remache A-F., Ventura R., Sarda M-P., Segura J-, Rodrigue F.-A., 2005, Hematologic reponse to four weeks of intermittent hypobaric hypoxia in highly trained athletes.
Nowadays, more and more people are looking for adventure travels, so they hike to high altitudes, over 2000 meters with hypobaric hypoxia environment [12].
ROS generated during early reperfusion contribute to intermittent hypobaric hypoxia-afforded cardioprotection against postischemia-induced Ca(2 +) overload and contractile dysfunction via the JAK2/STAT3 pathway.
Fluid-regulatory hormone responses during cycling exercise in acute hypobaric hypoxia.