Full record for graviton n.

Definition	a hypothetical particle that mediates gravity, analogous to the photon for electromagnetism
OED requirements	antedating 1941
Earliest cite	Ross Rocklynne, Time Wants A Skeleton
Comment	Mike Christie submitted a 1941 cite from Ross Rocklynne's "Time Wants A Skeleton". Earliest cite in the OED: 1942.
Last modified	6 July, 2008

Citations for graviton n.

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1990 F. Pohl World at End of Time (1993) 48	For lesser tasks he had the whole spectrum of photons at his disposal, too—radio, heat, visible light, gamma rays, X-rays, even gravitons.
1990 L. Niven Madness Has Its Place in L. Niven et al. Man-Kzin Wars III (1992) i. 15	A lot of those photos show what's maybe a graviton generator, maybe not.
1993 D. Carey Great Starship Race xi. 166	There's a pocket of gravitons caught in the flow of that cloud, sir.
1998 W. Shatner et al. Spectre iii. 42	On the screen, three violet beams of focused gravitons reached out to the stricken starship.
1999 M.J. Friedman My Brother's Keeper iii. xviii. 169	Kirk pressed the stud on the jury-rigged graviton projector.