/daɪˈæmɪtə(r) ||; daɪˈæmətɚ/noun
[C] a straight line that goes from one side to the other of a circle, passing through the centre 直径
☞Look at radius and circumference. 参看radius及circumference。 ☞picture at circle 见circle插图
diameter/daIˋæmətɚ; daIˈæmətə or daIˈæmItə/n [C,U] a line from one side of a circle to the other passing through the circle's centre 直径: 3 inches/1 meter etc in diameter The wheel was about two feet in diameter. 这轮子的直径约两英尺。