stellarator

noun
stel·lar·ator | \ˈsteləˌrātə(r)\
plural -s

Definition of stellarator 

: a toroidal device for producing controlled nuclear fusion that involves the confining and heating of a gaseous plasma by means of an externally applied magnetic field

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History and Etymology for stellarator

stellar + -ator (as in generator); from its use of temperatures approaching those occurring in some stars

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