soliton

Noun

• (physics) a quantum of energy or quasiparticle that can be propagated as a traveling wave in nonlinear systems and is neither preceded nor followed by another such disturbance; does not obey the superposition principle and does not dissipate
  • soliton waves can travel long distances with little loss of energy or structure
    

Related words

• Synonyms: 
  soliton wave , solitary wave