spinal muscular atrophy
noun
: any of several inherited disorders (as Kugelberg-Welander disease) that are characterized by the degeneration of motor neurons in the spinal cord resulting in muscular weakness and atrophy and that in some forms (as Werdnig-Hoffmann disease) are fatal
Cite this Entry
“Spinal muscular atrophy.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/spinal%20muscular%20atrophy. Accessed 4 Nov. 2025.
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