delta rhythm
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
delta rhythm
[′del·tə ‚rith·əm] (physiology)
An electric current generated in slow waves with frequencies of 0.5-3 per second from the forward portion of the brain of normal subjects when asleep.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.