noun
Medical term for the wasting away or shrinkage of a body part or tissue, often used in compound disease names.
筋萎縮症は筋肉が徐々に衰える病気です。
Muscular atrophy is a disease in which muscles gradually weaken.
彼は脊髄性筋萎縮症と診断された。
He was diagnosed with spinal muscular atrophy.