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App vs Captcha - What's the difference?

app | captcha |

As an initialism app

is actinobacllus pleuropneumoniae.

As a noun captcha is

(captcha).

app

English

Noun

(en-plural noun)

    • Anagrams

    *

    captcha

    English

    Noun

    (en noun)
  • A CAPTCHA is a human response test that requires you to enter a series of letters and/or numbers and/or symbols correctly to prove you are a human and not a computer program attempting to spam the site.
  • (by extension) Anything that a human must do to prove that they are not a computer.

    • Derived terms

    * audio CAPTCHA, a distorted audio file containing a voice reading numbers. * visual CAPTCHA, when a distinction must be made between an audio CAPTCHA and a distorted image.

    Usage notes

    Although occasionally spelt with lowercase letters (captcha), or with an initial uppercase letter (Captcha), most authors remain aware of its origin as an acronym and use uppercase. abandoned their attempt to trademark this term in 2008, as usage was already too widespread. (USPTO file number 78500434).

    See also

    * Turing test * ("CAPTCHA" on Wikipedia) English eponyms