Search Result for "orthopnea": 
Wordnet 3.0

NOUN (1)

1. form of dyspnea in which the person can breathe comfortably only when standing or sitting erect; associated with asthma and emphysema and angina pectoris; 



WordNet (r) 3.0 (2006):

orthopnea
    n 1: form of dyspnea in which the person can breathe comfortably
         only when standing or sitting erect; associated with asthma
         and emphysema and angina pectoris