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WordNet-Online 
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| Definitions from the WebSpinal Muscular AtrophyDefinition: Spinal Muscular Atrophy (SMA) is a genetic disorder characterized by the degeneration of motor neurons in the spinal cord, leading to muscle weakness and atrophy. Senses: 
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| spinal block spinal canal spinal code spinal column spinal cord spinal curvature spinal fluid spinal fusion spinal muscular atrophy spinal nerve spinal puncture spinal tap spinal vein spinally spinatch spindle-legged spindle-shanked 
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