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black vomit

noun
  1. vomit containing blood, often a manifestation of disease, such as yellow fever
  2. informal yellow fever
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

black vomit in Medicine

black vomit

n.
  1. Dark vomit consisting of digested blood and gastric contents.
  2. Severe yellow fever marked by regurgitation of dark vomited matter.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.