Full record for positronic adj.

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

Citations for positronic adj.

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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.