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WordReference Random House Unabridged Dictionary of American English © 2024FitzGer′ald contrac′tion, [Physics.]the hypothesis that a moving body exhibits a contraction in the direction of motion when its velocity is close to the speed of light. Also called Fitz•Ger′ald-Lo′rentz contrac′tion (fits jer′əld lôr′ents, -lōr′-),USA pronunciation Lorentz-FitzGerald contraction. - named after German. French. FitzGerald 1915–20
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