adjective Medicine/Medical.
  1. (of an anesthetic) having a specific gravity greater than that of cerebrospinal fluid.Compare hypobaric.
  2. pertaining to or utilizing gaseous pressure greater than normal, especially for administering oxygen in the treatment of certain diseases.

Origin of hyperbaric

First recorded in 1925–30; hyper- + baric2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Contemporary Examples of hyperbaric

British Dictionary definitions for hyperbaric


  1. of, concerned with, or operating at pressures higher than normal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hyperbaric

1930, from hyper- + Greek barys "heavy" (see grave (adj.)).

Online Etymology Dictionary, © 2010 Douglas Harper

hyperbaric in Medicine


  1. Of, relating to, producing, operating, or occurring at pressures higher than normal atmospheric pressure.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.