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Definition of Hypopnea

Hypopnea: Literally, underbreathing. Breathing that is shallower or slower than normal. Hypopnea is distinct from apnea in which there is no breathing.

Hypopnea comes from the Greek roots hypo- (meaning low, under, beneath, down, below normal) and pnoe (meaning breathing).

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/14/2012

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