from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A sound wave frequency of 440 cycles per second, assigned to the A above middle C. Also called concert pitch.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the pitch used to tune instruments for concert performances; usually assigns 440 Hz to the A above middle C
Sorry, no etymologies found.