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1. Thickening of tissue in the motor tracts of the lateral columns and anterior horns of the spinal cord; results in progressive muscle atrophy that starts in the limbs
   - amyotrophic lateral sclerosis, Lou Gehrig's disease

1. A silvery ductile metallic element found primarily in bauxite
   - aluminum [N. Amer], aluminium [Brit, Cdn], atomic number 13

Type of: induration, metal, metallic element, nervous disorder, neurological disease, neurological disorder, sclerosis

Part of: aluminium foil [Brit], aluminum foil [N. Amer], bauxite, Duralumin, tin foil

Encyclopedia: ALS