WordReference Random House Unabridged Dictionary of American English © 2025
equiv′alence prin′ciple, [Physics.]
- Physics(in relativity) the principle that, in any small region of space-time, the effects of a gravitational field are indistinguishable from those of an appropriate acceleration of the frame of reference. Also called Einstein's equivalency principle, principle of equivalence.
- 1915–20
'equivalence principle' also found in these entries (note: many are not synonyms or translations):