captcha
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CAPTCHA¹
- /ˈkæp.t͡ʃə/
Where it comes from
Coined by a team of researchers at Carnegie Mellon University in 2000 as a loose acronym of “completely automated public Turing test to tell computers and humans apart”.
noun CAPTCHAs · captcha · Captcha
- A computerized test requiring the human user to perform a task deemed to be difficult to automate, such as entering a displayed series of distorted characters or describing images, to demonstrate that they are a human and not a computer program. CAPTCHA puzzles are intended to be easy for a human to solve but difficult for a computer. Because of the monetary value to spammers of circumventing these controls, an arms race has occurred in which typical CAPTCHA puzzles have […]
captcha²
noun captchas
- Alternative letter-case form of CAPTCHA
Captcha³
noun Captchas
- Alternative letter-case form of CAPTCHA
Translations
Talk about this word "captcha." Wiktionary, via Micwyn, micwyn.com/word/captcha. Accessed 6 Nov. 2026. captcha. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/captcha "captcha." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/captcha.Cite this
@misc{captcha_2026,
title = {captcha},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/captcha},
urldate = {2026-11-06}
}
