Why is Px, Py, Pz orbitals called degenerate orbitals

Degenerate orbital have:

The orbitals are called degenerate when

Spectral line would not ne seen for a 2p_x - 2p_z transition p-orbitals are degenerate orbitals.

Transition of electron between p_x and p_y would not lead to an spectral line. p-orbitals are degenerate orbitals.