dispersion/dɪˈspɜ:ʃn; ?@ dɪˈspɜ:rʒn; dɪ`spəʒən/ n(a) [U] dispersal, esp of light 分散; 消散; （尤指光的）色散.(b) the Dispersion [sing]= the Diaspora.
牛津英汉双解词典