Which seismic waves are called transverse waves?

http://en.wikipedia.org/wiki/Seismic_wave

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Seismic waves are categorized into two main types: body waves and surface waves. The body waves consist of two types: P-waves (primary waves) and S-waves (secondary waves). Out of these, the P-waves are also known as Primary waves or Pressure waves, and they are compressional waves. On the other hand, the S-waves are also referred to as Secondary waves or Shear waves, and they are transverse waves.

Transverse waves move in a perpendicular direction to the direction of wave propagation. In the case of S-waves, they cause the ground to move up and down, or side to side, in a perpendicular motion to the direction of the wave travel. This movement resembles the motion of shaking a rope up and down or side to side. Therefore, S-waves are classified as transverse waves, while P-waves are considered compressional waves.

To summarize, the seismic waves called transverse waves are S-waves or Secondary waves.