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blacktongue

[blak-tuhng]
noun Veterinary Pathology.
  1. canine pellagra.
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Origin of blacktongue

An Americanism dating back to 1825–35; black + tongue
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

black tongue in Medicine

black tongue

n.
  1. The presence of a blackish- to yellowish-brown patch or patches on the tongue, accompanied by elongation of the papillae.melanoglossia
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.