Solitary wave and Travelling wave

Solitary wave 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.

Travelling wave and solitary wave are semantically related. In some cases you can use "Travelling wave" instead a noun phrase "Solitary wave".

Travelling wave noun - A wave in which the medium moves in the direction of propagation of the wave.

Solitary wave and travelling wave are semantically related. Sometimes you can replace phrase "Solitary wave" with "Travelling wave", this phrases are similar.