grey matter片語KK [gre ˋmætɚ] /ɡɹeɪ ˈmætɚ/發音片語1灰質、灰白質解剖The scan showed a loss of grey matter in that region of the brain.掃描顯示該腦區的灰質有所減少。2頭腦、腦力、智力口語This puzzle will really make you use your grey matter.這道謎題會讓你好好動一動腦子。