Captcha is a noun referring to a system designed to distinguish humans from automated bots, typically by presenting a challenge that only a person can solve. It stands for “Completely Automated Public Turing test to tell Computers and Humans Apart.” In everyday use, it often appears as an acronym or brand-like term for these tests. The pronunciation remains consistent across contexts, focusing on the two-syllable structure CAP-TCHA with a strong first syllable.
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