| Subject | English | Japanese |
| gen. | diffusivity equation | 拡散方程式 (かくさん・ほうていしき) |
| gen. | eddy diffusivity | 渦拡散係数 |
| gen. | eddy diffusivity | か動拡散 |
| gen. | eddy diffusivity | 渦動拡散 |
| gen. | eddy diffusivity for heat | 熱の渦拡散係数 |
| gen. | eddy diffusivity for heat | 渦温度伝導率 |
| gen. | eddy diffusivity for momentum | 渦動粘性係数 (かどうねんせいけいすう) |
| gen. | heat diffusivity | 熱拡散率 (netsu-kakusanritsu) |
| gen. | hydraulic diffusivity | 水頭拡散率 |
| supercond. | magnetic diffusivity | 磁気拡散率 |
| tech. | mal diffusivity | 温度拡散率 (ondo-kakusanritsu) |
| gen. | radiative diffusivity | 放射拡散率 |
| construct. | thermal diffusivity | 温度拡散率 (ondo-kakusanritsu) |
| gen. | thermal diffusivity | 熱拡散率 (netsu-kakusanritsu) |
| tech. | thermal diffusivity | 温度伝播率 (ondo-denpanritsu) |
| gen. | thermal diffusivity | 温度伝導率 (おんど・でんどうりつ) |