Full record for vibroknife n.

Definition =vibroblade also "vibraknife"
OED requirements antedating 1973
Earliest cite Alan Dean Foster, 'Bloodhype'
Comment Malcolm Farmer submitted a cite from a reprint of George R.R. Martin's "Plague Star"; Mike Christie verified it in the 1985 first magazine appearance.
Dan Tilque submitted a 1991 cite for the form "vibra-knife" from Lois McMaster Bujold's "Barrayar".
Malcolm Farmer submitted a cite from a 2000 reprint of Linda Evans' 1999 "The Stray".
Enoch Forrester submitted a cite from a 1987 reprint of Greg Benford and David Brin's 1986 "Heart of the Comet".
Michael Dolbear submitted a cite from a 2003 reprint of Sharon Lee and Steve Miller's "Conflict of Honors".
Douglas Winston submitted a cite from a 2004 reprint of L.E.Modesitt,Jr.'s 2003 "The Ethos Effect".
Ralf Brown located a cite for "vibrakife" in an electronic text of Alan Dean Foster's 1973 "Bloodhype", and David Dyer-Bennet verified it in a paper copy.
Malcolm Farmer submitted a 2003 cite from Richard Morgan's "Broken Angels"
Last modified 14 May, 2009

Citations for vibroknife n.

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1985 G. R. R. Martin in Analog Sci. Fiction/Sci. Fact Jan. 51/2 Kaj Nevis had produced a vibroknife. The slender, humming blade, which could slice through solid steel, was a blur of motion less than a centimeter from Tuf's nose.
1986 D. Brin & G. Benford Heart of Comet 288 Her mouth went dry as she saw the slim-bladed vibro-knife lying next to the corpse.
1988 S. Lee & S. Miller Partners In Necessity 223 The gleam was a vibroknife, not yet live.
1999 L. Evans Stray in D. Weber Worlds of Honor (2000) 64 Scott fumbled the vibro-knife off his belt clip and switched it on. The blade would cut through virtually anything known. It made short work of a section of branch as thick as Scott's wrist.
2003 R. Morgan Broken Angels 326 He took the vibroknife from Loemanako, activated it and kicked Hand again, stamping him onto his belly in the sand.
2003 L. E. Modesitt Ethos Effect xiv. 85 The first man—blocky and young—had a vibroknife. Van slammed that aside and twisted the heel of his boot through the would-be attacker's knee. The crunch was sickening. Van twisted the man's wrist and upper arm, with another snap, and the vibroknife dropped to the stone walk.