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[grav-i-tee-noh] /ˌgræv ɪˈti noʊ/
noun, Physics.
the hypothetical fermionic partner of the graviton, predicted by the supergravity extension of Einstein's theory of general relativity. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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gravitino in Science
A hypothetical particle postulated in supergravity theory to correspond to the graviton, just as neutrinos correspond to other fermions. See also neutrino, supergravity.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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