relativistic mass


noun Physics.

the mass of a body in motion relative to the observer: it is equal to the rest mass multiplied by a factor that is greater than 1 and that increases as the magnitude of the velocity increases.

Nearby words

  1. relatively prime numbers,
  2. relativeness,
  3. relativism,
  4. relativist,
  5. relativistic,
  6. relativistic quantum mechanics,
  7. relativity,
  8. relativize,
  9. relator,
  10. relatum

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


Science definitions for relativistic mass

relativistic mass

[rĕl′ə-tə-vĭstĭk]

In Special and General Relativity, the observed mass of an object moving with respect to the observer. The relativistic mass is a function of the rest mass and the velocity of the object. Compare rest mass.
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