n. The study of killing.

Example Citation:
The author of 'On Killing,' Grossman is one of the few American psychologists who specialize in 'killology,' the physical and mental processes of killing.
—Jim Dwyer, "Rudy Ordered His Cops to Hunt and Confront Urban Prey," Daily News (New York), February 14, 1999

Earliest Citation:
developmental psychology there is a general understanding that an individual must master the twin areas of sexuality and aggression (Freud's Eros and Thanatos) in order to have truly achieved adulthood. In the same way, the maturation of the human race necessitates our collective mastery of these two areas. In recent years we have made significant progress in the field of sexology, and this book is dedicated to the creation and exploration of the equivalent field of "killology."
—Dave Grossman, "On Killing: The Psychological Cost of Learning to Kill in War and Society," Little, Brown and Company, September 30, 1995

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