from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An early radio receiver using a crystal detector.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun An early
radio receiver, having no electrical power supplyexcept the radio wavesthemselves; it used a crystalof leador cadmium sulphideand a wire(the cat's whisker) touching the crystal's surface.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an early radio receiver using a crystal detector
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