hemoptysis

from WordNet (r) 3.0 (2006)

hemoptysis
    n 1: coughing up blood from the respiratory tract; usually
         indicates a severe infection of the bronchi or lungs [syn:
         {hemoptysis}, {haemoptysis}]

from The Collaborative International Dictionary of English v.0.48

Hemoptysis \He*mop"ty*sis\, n. [NL., fr. Gr. a"i^ma blood + ? to
   spit: cf. F. h['e]moptysie.] (Med.)
   The expectoration of blood, due usually to hemorrhage from
   the mucous membrane of the lungs.
   [1913 Webster]