from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The shortening of an object along its direction of motion as its speed approaches the speed of light, as measured by an observer at rest with respect to the body. Also called length contraction, Lorentz contraction.
After Hendrik Lorentz and George Francis FitzGerald (1851-1901), Irish physicist.(American Heritage® Dictionary of the English Language, Fourth Edition)