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captcha

Pronunciation: /ˈkaptʃə/
(also CAPTCHA)
Definition of captcha

noun

  • a computer program or system intended to distinguish human from machine input, typically as a way of thwarting spam and automated extraction of data from websites.

Origin:

early 21st century: acronym from Completely Automated Public Turing test to tell Computers and Humans Apart

captcha in other Oxford dictionaries

Definition of captcha in the US English dictionary

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