noun
multiple sclerosis; MS
Medical term for the chronic autoimmune disease affecting the central nervous system.
多発性硬化症は中枢神経系の自己免疫疾患です。
Multiple sclerosis is an autoimmune disease of the central nervous system.
Compound of 多発性 (multiple occurrence) + 硬化症 (sclerosis), a calque from English 'multiple sclerosis'.