Lorentz factor

Etymology
From its appearance in Lorentzian electrodynamics,.

Noun

 * 1)  a factor arising frequently in special relativity, to calculate the degree of time dilation, length contraction and relativistic mass of an object moving relative to an observer, defined as $$(1-v^2/c^2)^{-0.5}$$, where v and c are relative velocity and the speed of light, respectively

Translations

 * German: Lorentzfaktor
 * Swedish: Lorentzfaktor