Jisho

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Noun, Suru verb
1. nap; doze
Wikipedia definition
2. Power napA power nap is a short sleep which terminates before the occurrence of deep sleep or slow-wave sleep (SWS), intended to quickly revitalize the subject. The expression was coined by Cornell University social psychologist James Maas.
Read “Power nap” on English Wikipedia
Read “仮眠” on Japanese Wikipedia
Read “Power nap” on DBpedia

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