1. Health
Send to a Friend via Email

Discuss in my forum

Definition of Penile Tumescence

By

Updated February 18, 2014

Definition: Refers to the hardening and expansion of the penis into an erection. It occurs in association with REM sleep and may be noted first thing in the morning.
Examples:
He notices that first thing in the morning he awakens out of REM sleep with penile tumescence.
Related Video
How Much Sleep is Enough for Children?

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.