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We study the cyclotron resonance in the electron-hole joint Fermi surface ofa type-II Weyl semimetal. In magnetic field, the electron and hole pocketstouching at the Weyl node are hybridized to form quantized Landau levelscorresponding to semiclassical 8-shaped orbits. We calculate the dynamicalconductivities for the electric fields oscillating in $x$ and $y$-directionsand find that the resonant frequencies in $x$ and $y$ differ by the factor oftwo, reflecting to the figure-of-eight electron motion in the real space. Thepeculiar anisotropy in the cyclotron resonance serves as a uniquecharacteristic of the dumbbell-like Fermi surface.

Cyclotron resonance of figure-of-eight orbits in a type-II Weyl semimetal