# nocturnal penile tumescence

> spontaneous erection during or after sleep

**Wikidata**: [Q1929898](https://www.wikidata.org/wiki/Q1929898)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Nocturnal_penile_tumescence)  
**Source**: https://4ort.xyz/entity/nocturnal-penile-tumescence


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)