| X-ray units |
| Dream stages |
| Sleep phases |
| X-ray specs? |
| Sleep cycles |
| Dream states |
| Sleep stages |
| Reactor units |
| Sleep periods |
| Peeper motions |
| Roentgen items |
| Radiation doses |
| Sleep movements |
| Dream phenomena |
| Stages of sleep |
| Sleep phenomena |
| Radiation units |
| Deep-sleep times |
| Dream indicators |
| Physics measures |
| Sleep activities |
| Bedtime phenomena |
| Radiation amounts |
| Signs of dreaming |
| Sleep lab studies |
| Deep sleep stages |
| Deep sleep states |
| Radiation dosages |
| Doses of radiation |
| Units of radiation |
| X-ray measurements |
| Radiation measures |
| Radioactivity units |
| Airport scanner units |
| Radiation meas. units |
| Sleep cycle phenomena |
| Sleep phases, briefly |
| Sleep stages, briefly |
| Dream states, for short |
| Quantities in radiology |
| Sleep cycle occurrences |
| Phenomena after retiring |
| Dream indicators briefly |
| Radioactivity units (abbr.) |
| Dreamer's eyeball movements |
| Signs of dreaming for short |
| Certain sleep stages, in brief |
| Units of concern to nuclear scientists |