Muellerius
noun
Muel·le·ri·us
| \ myü-ˈlir-ē-əs
\
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Medical Definition of Muellerius
: a genus of lungworms of the family Metastrongylidae that include forms (as M. capillaris synonym M. minutissimus) infecting the lungs of sheep and goats and having larval stages in various snails and slugs