supergravity

noun
su·per·grav·i·ty | \ ˌsü-pər-ˈgra-və-tē \

Definition of supergravity 

: any of various theories in physics that are based on supersymmetry and attempt to unify general relativity and quantum theory and that state that the principal transmitter of gravity is the graviton

First Known Use of supergravity

1976, in the meaning defined above

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The first known use of supergravity was in 1976

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