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black tongue



  1. in canines, a disorder associated with a deficency of nicotinic acid.
  2. black to yellowish-brown discoloration of the dorsum of the tongue due to staining by exogenous material such as the components of tobacco; usually superimposed on hairy tongue.

Synonym(s): black hairy tongue, lingua nigra, melanoglossia, nigrities linguae

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.