WordReference Random House Unabridged Dictionary of American English © 2026
grand′ unifica′tion the′ory, [Physics.]
  1. Physicsa possible future quantum field theory that would encompass both the electroweak theory and quantum chromodynamics. Abbr.: GUT Also called grand′ u′nified the′ory. 
  • 1980–85

'grand unification theory' also found in these entries (note: many are not synonyms or translations):
gut

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