white matter
noun [ U ] anatomy specialized uk/ˈwaɪt ˌmæt.ər/ us/ˈwaɪt ˌmæt̬.ɚ/
白质（见于大脑和脊髓的淡色组织，内含丝状的神经纤维结构）
the pale tissue containing nerve fibres (= structures like threads) found in the brain and spinal cord
Compare: grey matter
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