SINCE 1828
nomen dubium
noun
nomen du·bi·um
| \-ˈdü-bē-əm,
-ˈdyü-\
-ˈdyü-\
plural nomina dubia\ -ˈdü-bē-ə ,
-ˈdyü-
\
-ˈdyü-
\
Definition of nomen dubium
: a taxonomic name that cannot be assigned with certainty to any taxonomic group because the description is insufficient for identification and the original specimens no longer exist
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