gravitino

noun
grav·​i·​ti·​no | \ˌgra-və-ˈtē-nō \

Definition of gravitino 

: a hypothetical fermion that is associated with the graviton in theories of supergravity

First Known Use of gravitino

1977, in the meaning defined above

History and Etymology for gravitino

graviton + -ino (as in neutrino)

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The first known use of gravitino was in 1977

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