noun Medicine/Medical.
  1. the discharge of black, tarry, bloody stools, usually resulting from a hemorrhage in the alimentary tract.
Also melaena.

Origin of melena

< New Latin < Greek mélaina, feminine of mélās black Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

melena in Medicine


  1. 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.