multinuclear

adjective
mul·​ti·​nu·​cle·​ar | \ ˌməl-tē-ˈnü-klē-ər How to pronounce multinuclear (audio) , -ˌtī-, -ˈnyü-, nonstandard -kyə-lər\

Definition of multinuclear

1 : multinucleated especially : having or involving more than two atomic nuclei … we had two NMR spectrometers available for a large number of students to use for their research. One was set up for multinuclear spectra … . — Sheri Blystone
2 : having multiple world powers armed with nuclear weapons It was the frightening prospect of a multinuclear world as much as the older Arab-Israeli confrontation that propelled American policy on the Middle East.— William Hyland

First Known Use of multinuclear

1853, in the meaning defined at sense 1

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The first known use of multinuclear was in 1853

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