| English | eng-000 |
| refractometer index | |
| 普通话 | cmn-000 | 折射率 |
| English | eng-000 | index of refraction |
| English | eng-000 | refracting index |
| English | eng-000 | refracting power |
| English | eng-000 | refractive index |
| English | eng-000 | refractive rate |
| English | eng-000 | refractivity |
| English | eng-000 | refracture index |