| English | eng-000 |
| refractive exponent | |
| 普通话 | cmn-000 | 折光指数 |
| 普通话 | cmn-000 | 折射指数 |
| 普通话 | cmn-000 | 折射率 |
| English | eng-000 | index of refraction |
| English | eng-000 | refracted index |
| English | eng-000 | refraction index |
| English | eng-000 | refractive index |
| русский | rus-000 | показатель преломления |