captcha
noun/ˈkæptʃə/
/ˈkæptʃə/
(also CAPTCHA)
[countable, uncountable]- a computer program that is designed to recognize the difference between human users and machines, often showing letters or numbers with their shape changed slightly
- The captcha can only be solved by humans.
Word OriginAn acronym from Completely Automated Public Turing test to tell Computers and Humans Apart.
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captcha