An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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longitudinal mass
  جرم ِ درژنایی  
jerm-e derežnâyi
Fr.: masse longitudinale  

In special relativity theory, the mass of a body when the acceleration is parallel or anti-parallel to velocity: ml = m0 / [1 - (v/c)2]3/2,
where m0 is the → rest mass, v is the velocity, and c the → velocity of light. → transverse mass.

See also: → longitudinal; → mass.