1977, in the meaning defined above
graviton + -ino (as in neutrino)
Time Traveler for gravitino
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Cite this Entry
“Gravitino.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gravitino. Accessed 3 Dec. 2021.
More from Merriam-Webster on gravitino
Britannica.com: Encyclopedia article about gravitino
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