bevel gear(n = noun.artifact) pinion and crown wheel, pinion and ring gear - gears that mesh at an angle;
is a kind of cogwheel, gear, gear wheel, geared wheel
has particulars: differential, differential gear

   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]

bevel, bevel square, chafing gear, change gear, clash gear, differential gear, epicyclic gear, epicyclic gear train, first gear, fishing gear, foul-weather gear, gear, gear case, gear lever, gear mechanism, gear to, gear up, gear wheel, head gear, high gear, in gear, irreversible steering gear, landing gear, low gear, out of gear, pinion and ring gear, planet gear, planetary gear, reduction gear, second gear, spur gear, stable gear, steering gear, sun gear, third gear, wedge gear, worm gear