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Definition of ALS noun from the Oxford Advanced Learner's Dictionary

ALS

noun
 
/ˌeɪ el ˈes/
 
/ˌeɪ el ˈes/
(also Lou Gehrig's disease)
[uncountable]
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  1. a disease that affects nerve cells in the spine and causes muscles to become weak and gradually stop working (the abbreviation for
    amyotrophic lateral sclerosis
    )
    • He was diagnosed with ALS five years ago.
    compare motor neurone diseaseTopics Health problemsc2
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