|Definition||related to or designed to use positrons|
|OED requirements||antedating 1941|
|Earliest cite||I. Asimov 'Reason'|
|Comment||Mike Christie submitted a 1941 cite from Isaac Asimov's 'Reason'.
Earliest cite in the OED: 1948.
|Last modified||6 July, 2008|
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|1941 I. Asimov in Astounding Sci. Fiction May 44/1||By exact count, there are seventy-five thousand, two hundred and thirty-four operations necessary for the manufacture of a single positronic brain.|
|1941 I. Asimov in Astounding Sci. Fiction May 44/1||We've produced a positronic brain of supposedly ordinary vintage that's got the remarkable property of being able to tune in on thought waves.|
|1941 I. Asimov Reason in E. S. Rabkin Sci. Fiction: Historical Anthol. (1983) 319||One is fact to face with an inscrutable positronic brain.|
|1995 P. David Captain's Daughter i. ii. 16||Thousands of landing-party assignments had been fed into a vast database, processed through positronic circuitry as perfected in the M9 computer.|
|1996 W. Shatner Return xix. 154||His positronic brain had had enough processing time to review the contents of the last four standard years of the journal.|
|1998 W. Shatner et al. Spectre xxvi. 308||My positronic net is capable of operating within a relativistically accelerated frame of reference for short periods of time.|