ORTHOPNOEA

Etymology

Noun

orthopnoea (usually uncountable, plural orthopnoeas or orthopnoeae)

Shortness of breath when lying flat, causing the person to have to sleep propped up in bed or sitting in a chair.

Source: Wiktionary

Or`thop*noe"a, Or*thop"ny, n. Etym: [L. orthopnoea, Gr. orthopnée.] (Med.)

Definition: Specifically, a morbid condition in which respiration can be performed only in an erect posture; by extension, any difficulty of breathing.

Source: Webster’s Unabridged Dictionary 1913 Edition