nomen dubium
noun
no·men du·bi·um
ˈnō-mən-ˈdü-bē-əm 
-ˈdyü-
plural nomina dubia
ˈnä-mə-nə-ˈdü-bē-ə
-ˈdyü-,
ˈnō-
: 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
Dictionary Entries Near nomen dubium
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“Nomen dubium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nomen%20dubium. Accessed 29 Nov. 2024.
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