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WordReference Random House Unabridged Dictionary of American English © 2024Ein•stein (īn′stīn; Ger. īn′shtīn′),USA pronunciation n. Al•bert (al′bərt; Ger. äl′bert),USA pronunciation 1879–1955, German physicist, U.S. citizen from 1940: formulator of the theory of relativity;
Nobel prize 1921.Al•fred (al′frid; Ger. äl′fret),USA pronunciation 1880–1952, German musicologist in U.S.- (l.c.) [Physics, Chem.]a unit of radiant energy, equal to the energy of radiation that is capable of photochemically changing one mol of a photosensitive substance.
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