from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A metal identification disk attached to a dog's collar.
  • noun A metal identification tag worn on a chain around the neck by members of the armed forces.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A small metal disk, attached to a dog's collar, containing identification information
  • noun by extension The identification tags worn around the neck by military personnel

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun metal plate on a dog collar bearing its registration number
  • noun military identification tag worn on a chain around the neck


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