from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a public address system
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a loudspeaker
A genericised trademark of Tannoy Ltd, a manufacturer of public address systems. "Tannoy" is a syllabic abbreviation of tantalum alloy, which was the material used in a type of electrolytic rectifier developed by the company. (Wiktionary)