melaena
/mɪˈliːnə/(亦作 melena)
noun
mass noun
1- Medicine dark sticky faeces containing partly digested blood【医】黑粪。
1.1
- the production of such faeces, following internal bleeding or the swallowing of blood黑粪症（体内出血或吞咽血液所致）。
词源
early 19th cent.: modern Latin, from Greek melaina, feminine of melas 'black'.