hematemesis
noun
he·ma·tem·e·sis
variants:
or chiefly British haematemesis \ ˌhē-mə-ˈtem-ə-səs also ˌhē-mə-tə-ˈmē-səs \
plural hematemeses\ -ˌsēz 
\
\
Medical Definition of hematemesis
: the vomiting of blood