DICT.TW Dictionary Taiwan

 principle of superposition
      n 1: (geology) the principle that in a series of stratified
           sedimentary rocks the lowest stratum is the oldest [syn:
            superposition principle, superposition]
      2: the displacement of any point due to the superposition of
         wave systems is equal to the sum of the displacements of
         the individual waves at that point; "the principle of
         superposition is the basis of the wave theory of light"
         [syn: Huygens' principle of superposition]