Criminology

google

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late 19th century: from Latin crimen, crimin- ‘crime’ + -logy.

wiktionary

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criminal +‎  -logy

etymonline

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criminology (n.)

"the science of crime," 1890, from Latin stem of criminal + -ology. Criminologist "one who studies crime" is recorded from 1857. Criminalist "authority on criminal law" is from 1630s.