New American Oxford Dictionary
Cheka
Che ka |ˈCHekə ˈtʃɛkə | an organization under the Soviet regime for the investigation of counterrevolutionary activities. It executed many real and alleged enemies of Lenin's regime from its formation in 1917 until 1922 when it was replaced by the OGPU. ORIGIN Russian, from che, ka, the initial letters of Chrezvychaĭnaya komissiya ‘Extraordinary Commission (for combating Counterrevolution, Sabotage, and Speculation ).’
Oxford Dictionary
Cheka
Cheka |ˈtʃɛkə | an organization under the Soviet regime for the investigation of counter-revolutionary activities. It executed many real and alleged enemies of Lenin's regime from its formation in 1917 until 1922, when it was replaced by the OGPU. ORIGIN Russian, from che, ka, the initial letters of Chrezvychaĭnaya komissiya ‘Extraordinary Commission (for combating Counter-revolution, Sabotage, and Speculation )’.