Definition of myotonic dystrophy
: a muscular disorder that is characterized by dystrophic muscle weakness and myotonia affecting multiple bodily systems and that is caused by an abnormally high number of repeats of a codon in the genetic material
First Known Use of myotonic dystrophy
Medical Definition of myotonic dystrophy
: an inherited condition that is characterized by delay in the ability to relax muscles after forceful contraction, wasting of muscles, formation of cataracts, premature baldness, atrophy of the gonads, endocrine and cardiac abnormalities, and often mental retardation and that is inherited as an autosomal dominant trait—abbreviation DM; called also Steinert's disease
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