from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A radio frequency in the range from 30 to 300 kilohertz.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a pitch that is perceived as below other pitches
- n. 30 to 300 kilohertz
Sorry, no etymologies found.
"Essentially," Harper said, "it's a series of very low frequency radio receivers near the North Pole that listen to the sounds of the earth – plasma wave emissions from the northern lights, broadband pulses from lightning storms, that sort of thing."
Fathoms below, a sickening low frequency rumble resonated upward through the water as the gigantic submerged sheet began scraping its way back up the face of the glacier.