Meaning of “melaena” in the English Dictionary

british dictionary

"melaena" in British English

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melaenanoun [ U ]

UK specialized US melena uk /məˈliː.nə/ us /məˈliː.nə/

dark, solid body waste that contains blood as a result of bleeding in the upper part of the intestines:

Overdosage may cause nausea, dizziness, hyperventilation, vomiting, and melaena.

(Definition of “melaena” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)