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