| Inner rind |
| Reflective quality |
| Concept in astronomy |
| Reflectivity measure |
| Earth's reflectiveness |
| Light reflection ratio |
| Astronomer's light ratio |
| Light ratio in astronomy |
| Measure of reflected light |
| Reflecting power of a planet |
| Planetary reflectivity measure |
| Planetary reflected-light ratio |
| Reflective power, as of a planet |
| Ratio of planetary reflectiveness |
| Reflectivity measure, in astronomy |
| Whitish inner part of an orange's rind |