gear

1. A toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion (synset 103435461)
   is a type of: wheel - a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
   subtypes:

   • bevel gear, pinion and crown wheel, pinion and ring gear - gears that mesh at an angle
   • escape wheel - gear that engages a rocking lever
   • pinion - a gear with a small number of teeth designed to mesh with a larger wheel or rack
   • epicyclic gear, planet gear, planet wheel, planetary gear - an outer gear that revolves about a central sun gear of an epicyclic train
   • rack and pinion - a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa)
   • spur gear, spur wheel - gear wheels that mesh in the same plane
   • sun gear - the central gear in an epicyclic train
   • worm gear - gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel); changes the direction of the axis of rotary motion
   • worm wheel - gear with the thread of a worm
   has:

   • cog, sprocket - tooth on the rim of gear wheel
   • tooth - one of a number of uniform projections on a gear
   same as: cogwheel, gear wheel, geared wheel
2. Wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed (synset 103436655)
   "the fool got his tie caught in the geartrain"
   is a type of: wheelwork - mechanical device including an arrangement of wheel in a machine (especially a train of gears)
   subtypes:

   • epicyclic gear train, epicyclic train - a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis
   • reduction gear - gearing that reduces an input speed to a slower output speed
   is a part of: engine - motor that converts thermal energy to mechanical work
   same as: gearing, geartrain, power train, train
3. A mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle) (synset 103436153)
   is a type of: mechanism - device consisting of a piece of machinery; has moving parts that perform some function
   subtypes:

   • first, first gear, low, low gear - the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving
   • gearset - a set of gears
   • high, high gear - a forward gear with a gear ratio that gives the greatest vehicle velocity for a given engine speed
   • park - a gear position that acts as a parking brake
   • reverse, reverse gear - the gears by which the motion of a machine can be reversed
   • second, second gear - the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle
   • steering gear - a gear that couples the steering wheel to the steering linkage of a motor vehicle
   • third, third gear - the third from the lowest forward ratio gear in the gear box of a motor vehicle
   • transmission, transmission system - the gears that transmit power from an automobile engine via the driveshaft to the live axle
   same as: gear mechanism
4. Equipment consisting of miscellaneous articles needed for a particular operation or sport etc. (synset 103435869)
   is a type of: equipment - an instrumentality needed for an undertaking or to perform a service
   subtypes:

   • fishing gear, fishing rig, fishing tackle, rig, tackle - gear used in fishing
   • kit, outfit - gear consisting of a set of articles or tools for a specified purpose
   • regalia - paraphernalia indicative of royalty (or other high office)
   • rig - gear (including necessary machinery) for a particular enterprise
   • rigging, tackle - gear consisting of ropes etc. supporting a ship's masts and sails
   • saddlery, stable gear, tack - gear for a horse
   same as: appurtenance, paraphernalia

1. Set the level or character of (synset 200299025)
   "She pitched her speech to the teenagers in the audience"
   is a type of: accommodate, adapt - make fit for, or change to suit a new purpose
   subtypes: popularise, popularize - make understandable to the general public
   same as: pitch

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