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TAKE THE QUIZorthopnea
noun
or·thop·nea
variants
or chiefly British orthopnoea
ȯr-ˈthäp-nē-ə also ˌȯr-ˌthäp-ˈnē-ə
: difficulty in breathing that occurs when lying down and is relieved upon changing to an upright position (as in congestive heart failure)
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Merriam-Webster unabridged
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