Definición de captcha en inglés:

captcha

Silabificación: captcha
Pronunciación: /ˈkapSHə
 
/
(also CAPTCHA)

sustantivo

A program or system intended to distinguish human from machine input, typically as a way of thwarting spam and automated extraction of data from websites.
Más ejemplos en oraciones
  • The spammers are thinking up ever more ingenious ways to break the captchas.
  • Every time you edit a page, you have to pass a captcha.
  • I guess the spammers tools are too simplistic to even attempt to break the captcha.

Origen

early 21st century: acronym from completely automated public Turing test to tell computers and humans apart.

Definición de captcha en:

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Palabra del día noisome
Pronunciación: ˈnɔɪs(ə)m
adjective
having an extremely offensive smell