gears that mesh at an angle
To allow for a quieter transmission of power, a bevel gear has teeth cut on the bevel with relation to the axis of the gear to allow it to mesh with another bevel gear.
a gear working another gear at an angle to it by means of bevel wheels.
Bevel gears are gears where the axes of the two shafts intersect and the tooth-bearing faces of the gears themselves are conically shaped.