Etymology
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pre- + bedtime
Adjective
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prebedtime (not comparable)
- Before bedtime.
2015 June 1, Gunther Eysenbach et al., “A Platform to Build Mobile Health Apps: The Personal Health Intervention Toolkit (PHIT)”, in JMIR mHealth and uHealth[1], volume 3, →DOI:The app includes daily diaries for prebedtime activities, substance use, and sleep quality.