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Noun: depressurisation  dee,pre-shu-ru'zey-shun [N. Amer], dee,pre-shu-rI'zey-shun [Brit]
Usage: Brit
  1. Loss of pressurization; a reduction of atmospheric pressure within a chamber or aircraft, etc.
    - depressurization

Derived forms: depressurisations

Encyclopedia: Depressurisation