Wordnet 3.0
NOUN (1)
1. 
 a respiratory disease of unknown etiology that apparently originated in mainland China in 2003; 
 characterized by fever and coughing or difficulty breathing or hypoxia; 
 can be fatal; 
[syn: severe acute respiratory syndrome, SARS]
WordNet (r) 3.0 (2006):
severe acute respiratory syndrome
    n 1: a respiratory disease of unknown etiology that apparently
         originated in mainland China in 2003; characterized by
         fever and coughing or difficulty breathing or hypoxia; can
         be fatal [syn: severe acute respiratory syndrome, SARS]