Definition of hyperbaric adjective from the Oxford Advanced Learner's Dictionary

 

hyperbaric

 adjective
adjective
BrE BrE//ˌhaɪpəˈbærɪk//
 
; NAmE NAmE//ˌhaɪpərˈbærɪk//
 
(physics)
 
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(of gas) at a higher pressure than normal Word Origin 1960s: from hyper- ‘above normal’ + Greek barus ‘heavy’.
See the Oxford Advanced American Dictionary entry: hyperbaric

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