柯林斯詞典white matter 1. N the whitish tissue of the brain and spinal cord, consisting mainly of myelinated nerve fibres 白質 (Technical name substantia alba)→compare grey matter 返回 white matter劍橋詞典the pale tissue containing nerve fibres (= structures like threads ) found in the brain and spinal cord 白質（見于大腦和脊髓的淡色組織，內含絲狀的神經纖維結構） 比較grey matter 返回 white matter