1. Noun.  A distorted image of letters and numbers used to prevent automated use of websites.
  2. Noun.  (by extension) Anything that a human must do to prove that they are not a computer.
  3. Noun.  (alternative capitalization of, CAPTCHA) .
  4. Noun.  (alternative capitalization of, CAPTCHA) .

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This entry was last updated on RefTopia from its source on 3/20/2012.