| melaena | 1. <gastroenterology> The passage of dark, pitchy and grumous stools stained with blood pigments or with altered blood. 2. Black vomit. Origin: Gr. Melaina, feminine of Gr. Melas = black (18 Nov 1997) |
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| melaena | abnormally dark tarry feces containing blood (usually from gastrointestinal bleeding) |
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