white matter disease
noun [ U ] medical specialized uk/ˈwaɪt ˌmæt.ə dɪˌziːz/ us/ˈwaɪt ˌmæt̬.ɚ dɪˌziːz/
脑白质病
a disease of the tissue and nerves of the brain and spinal cord that gradually makes the muscles less strong and coordination worse