In canines, a disorder associated with a deficency of nicotinic acid.
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.
Synonyms: lingua nigra, melanoglossia, nigrities linguae.
(05 Mar 2000)
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black-tongue disease, black urine, black vomit
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