[1] : The Collaborative International Dictionary of English v.0.48

bevel gear \bev"el gear`\ mech.
   a kind of gear in which the two wheels working together lie
   in different planes, and have their teeth cut at right angles
   to the surfaces of two cones whose apices coincide with the
   point where the axes of the wheels would meet.
   1913 webster

[2] : WordNet (r) 2.0

bevel gear
     n : gears that mesh at an angle syn: pinion and crown wheel,
         pinion and ring gear
see also:
pinion and crown wheel pinion and ring gear 

Bevel >> B Words
Bevel, definition of term: Bevel
bevel_pag1.html

Gear >> G Words
Gear, definition of term: Gear
gear_pag1.html

Gear Wheel >> G Words
Gear Wheel, definition of term: Gear Wheel
gear+wheel_pag1.html

Gear Up >> G Words
Gear Up, definition of term: Gear Up
gear+up_pag1.html

Gear Mechanism >> G Words
Gear Mechanism, definition of term: Gear Mechanism
gear+mechanism_pag1.html

Planetary Gear >> P Words
Planetary Gear, definition of term: Planetary Gear
planetary+gear_pag1.html

Epicyclic Gear >> E Words
Epicyclic Gear, definition of term: Epicyclic Gear
epicyclic+gear_pag1.html