A suicide prevention expert has called for the term "homicide bomber" to replace the widely used "suicide bomber".
University of Adelaide psychiatry professor Robert Goldney says people who kill themselves while murdering others have few similarities to actual suicide victims.
"The usual feelings of hopelessness and unbearable psychic pain, along with self-absorption and restriction of options in those who are suicidal, are the antithesis of terrorist acts," he said in a statement on Monday.
"Mental disorders also do not appear to be a prominent feature in suicide bombers."
Prof Goldney said using the term homicide bomber was not entirely accurate because of the political and military context in which these deaths occurred.
But he said it was more appropriate than the continued use of the word suicide.
"Clearly there is no simple answer to what has occurred increasingly over the last decades," he said.
"However, by the use of the words homicide bomber, a gradual change in the worldwide interpretation and acceptability of these acts may occur."