- the discharge of black, tarry, bloody stools, usually resulting from a hemorrhage in the alimentary tract.
Origin of melena
< New Latin < Greek mélaina, feminine of mélās black
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
- The passage of black tarlike stools containing blood that has been acted on by the intestinal juices.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.