Orthopnoea
Pronunciation : Or`thop*noe"a, Or*thop"ny
Part of Speech : n.
Etymology : [L. orthopnoea, Gr. orthopn?e.] (Med.)
Definition : Defn: 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