Hyperbaric \Hy`per*bar"ic\, a. [hyper- + baric.]
   1. of, pertaining to, or using a pressure that is greater
      than normal atmospheric pressure; as, a hyperbaric
      chamber, where divers may decompress slowly to avoid the
      bends.
      [PJC]

   2. of, pertaining to, or using an oxygen pressure that is
      greater than that at normal atmospheric pressure; as, a
      hyperbaric tent to provide additional oxygen to patients
      with breathing difficulty.
      [PJC]