NMO
noun [ U ] medical specialized uk/ˌen.emˈəʊ/ us/ˈenˌemˈoʊ/
视神经脊髓炎（neuromyelitis optica的缩写）
abbreviation for neuromyelitis optica: a condition that affects the nerves of the arms, legs, and eyes resulting in weakness and loss of feeling in the legs and loss of vision