from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A pattern of smooth, regular electrical oscillations in the human brain that occur when a person is awake and relaxed. As recorded by the electroencephalograph, alpha waves have a frequency of 8 to 13 hertz. Also called alpha rhythm.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An electrical signal produced by the brain while the subject is relaxed.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz
Sorry, no etymologies found.