Definition of FitzGerald contraction in English:

FitzGerald contraction

(also FitzGerald–Lorentz contraction)

noun

Physics
  • The shortening of a moving body in the direction of its motion, especially at speeds close to that of light.

Origin

Named after George. F. FitzGerald (1851–1901), Irish physicist, and H. A. Lorentz(see Lorentz, Hendrik Antoon), who independently postulated the theory in 1892.

Pronunciation:

FitzGerald contraction

/fɪtsˈdʒɛr(ə)ld/