multinuclear

adjective

mul·​ti·​nu·​cle·​ar ˌməl-tē-ˈnü-klē-ər 

-ˌtī-,

-ˈnyü-,

 nonstandard  -kyə-lər

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

Word History

First Known Use

1853, in the meaning defined at sense 1