decompression noun definition in Diving topic from the Oxford Advanced Learner's Dictionary

decompression

 noun: Diving topic
a reduction in air pressure; the act of reducing the pressure of the air a decompression chamber (= a piece of equipment that divers sit in so that they can return slowly to normal air pressure after being deep in the sea) decompression sickness (= severe pain and difficulty in breathing experienced by divers who come back to the surface of deep water too quickly)

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