hematemesis

from WordNet (r) 3.0 (2006)

hematemesis
    n 1: vomiting blood [syn: {hematemesis}, {haematemesis}]

from The Collaborative International Dictionary of English v.0.48

Hematemesis \Hem`a*tem"e*sis\, n. [NL., fr. Gr. a"i^ma,
   a"i`matos, blood + ? a vomiting, fr. ? to vomit.] (Med.)
   A vomiting of blood.
   [1913 Webster]