| 单词 | gear |
| 释义 | gear (once / 514 pages) 1nv 2n The noun gear refers to several things. First, it’s the equipment we need for a sport or event. A gear is also a wheel with teeth that interlocks with another gear to transmit motion in a machine. The background of gear as "equipment" dates back to around 1200 and comes from the Old Norse gervi, "apparel." The word gear in machinery became common in the early 19th century, although there is evidence that the word came to mean "toothed wheel" as early as 1520. Gear entered English slang around 1951, meaning something stylish. This use was popularized in the 1960s, under the influence of British pop music. WORD FAMILYgear: geared, gearing, gears+/geared: ungeared/gearing: gearings USAGE EXAMPLESThere were kids in soccer gear and a woman in a sari staring at her cellphone. Washington Post(Jan 01, 2017) Clemson’s players asked what he was doing when he changed into football gear. Wall Street Journal(Jan 02, 2017) Airport officials say the landing gear on the Hawker Jet collapsed on landing Monday afternoon. Washington Times(Jan 02, 2017) 1 1n a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion Syn|Hypo|Hyper cogwheel, gear wheel, geared wheel bevel gear, pinion and crown wheel, pinion and ring gear gears that mesh at an angle escape wheelgear that engages a rocking lever piniona gear with a small number of teeth designed to mesh with a larger wheel or rack epicyclic gear, planet gear, planet wheel, planetary gearan outer gear that revolves about a central sun gear of an epicyclic train rack and piniona wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa) spur gear, spur wheelgear wheels that mesh in the same plane sun gearthe central gear in an epicyclic train worm geargear 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 wheelgear with the thread of a worm differential, differential geara bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves lantern pinion, lantern wheela small pinion having cylindrical bars instead of teeth, used chiefly in inexpensive clocks 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) 2n a mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle) Syn|Hypo|Hyper gear mechanism 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 gearseta set of gears high, high geara forward gear with a gear ratio that gives the greatest vehicle velocity for a given engine speed parka gear position that acts as a parking brake reverse, reverse gearthe gears by which the motion of a machine can be reversed second, second gearthe gear that has the second lowest forward gear ratio in the gear box of a motor vehicle steering geara gear that couples the steering wheel to the steering linkage of a motor vehicle third, third gearthe third from the lowest forward ratio gear in the gear box of a motor vehicle transmission, transmission systemthe gears that transmit power from an automobile engine via the driveshaft to the live axle automatic drive, automatic transmissiona transmission that automatically changes the gears according to the speed of the car 4WD, four-wheel drivea transmission that provides power directly to all four wheels of a motor vehicle hydraulic transmission, hydraulic transmission systema transmission that depends on a hydraulic system overdrivea high gear used at high speeds to maintain the driving speed with less output power standard transmission, stick shifta transmission that is operated manually with a gear lever and a clutch pedal mechanism device consisting of a piece of machinery; has moving parts that perform some function 3n wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed Syn|Hypo|Hyper gearing, geartrain, power train, train epicyclic gear train, epicyclic train a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis reduction geargearing that reduces an input speed to a slower output speed wheelwork mechanical device including an arrangement of wheel in a machine (especially a train of gears) 4v set the level or character of 2Syn|Hypo|Hyper pitch popularise, popularize make understandable to the general public accommodate, adapt make fit for, or change to suit a new purpose n equipment consisting of miscellaneous articles needed for a particular operation or sport etc. Syn|Hypo|Hyper appurtenance, paraphernalia fishing gear, fishing rig, fishing tackle, rig, tackle gear used in fishing kit, outfitgear consisting of a set of articles or tools for a specified purpose regaliaparaphernalia indicative of royalty (or other high office) riggear (including necessary machinery) for a particular enterprise rigging, tacklegear consisting of ropes etc. supporting a ship's masts and sails saddlery, stable gear, tackgear for a horse bitpiece of metal held in horse's mouth by reins and used to control the horse while riding caparison, housing, trappingstable gear consisting of a decorated covering for a horse, especially (formerly) for a warhorse carpenter's kit, tool kita set of carpenter's tools cinch, girthstable gear consisting of a band around a horse's belly that holds the saddle in place crown jewelsregalia (jewelry and other paraphernalia) worn by a sovereign on state occasions drill rig, drilling rig, oil rig, oilrigrig used in drilling for oil or gas first-aid kitkit consisting of a set of bandages and medicines for giving first aid hamestable gear consisting of either of two curved supports that are attached to the collar of a draft horse and that hold the traces harnessstable gear consisting of an arrangement of leather straps fitted to a draft animal so that it can be attached to and pull a cart headgearstable gear consisting of any part of a harness that fits about the horse's head layettekit consisting of a complete outfit (clothing and accessories) for a new baby martingalea harness strap that connects the nose piece to the girth; prevents the horse from throwing back its head mess kitkit containing a metal dish and eating utensils; used by soldiers and campers horse blanket, saddle blanket, saddleclothstable gear consisting of a blanket placed under the saddle sewing kita kit of articles used in sewing yokestable gear that joins two draft animals at the neck so they can work together as a team equipment an instrumentality needed for an undertaking or to perform a service |
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