Definitions of ALS

n 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

Lou Gehrig's disease, amyotrophic lateral sclerosis
Type of:
nervous disorder, neurological disease, neurological disorder
a disorder of the nervous system
induration, sclerosis
any pathological hardening or thickening of tissue

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