名詞 melena:

1. abnormally dark tarry feces containing blood (usually from gastrointestinal bleeding)
   同義詞：melaena

me.le.na

n.（名詞）
A condition marked by black, tarry stool or vomit composed largely of blood that has been acted on by gastric juices, resulting from a hemorrhage along the digestive tract.
黑糞癥：由消化道大出血而引起的病癥，其特征為排出黑色柏油樣糞便或以經(jīng)胃液分解之血液為主要成分的嘔吐物

來源：
New Latin melôna
現(xiàn)代拉丁語 melôna
from Greek melaina [feminine of] melas [black]
源自 希臘語 melaina [] melas的陰性詞 [黑色的]