McArdle's disease
noun
Mc·Ar·dle's disease
| \ mək-ˈärd-ᵊlz-
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Medical Definition of McArdle's disease
: a glycogen storage disease that is inherited as an autosomal recessive trait, is marked especially by muscle weakness and myoglobinuria, and is caused by deficiency of a phosphorylase normally present in skeletal muscle
— called also McArdle's syndrome