User:Nicolas Delahaye/edit/en/en/gear

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n

 * 1) a toothed wheel that engages with another toothed wheel or with a rack in order to change the speed or direction of transmitted motion.
 * 2) a mechanism for transmitting motion by gears, esp for a specific purpose: the steering gear of a boat.
 * 3) the engagement or specific ratio of a system of gears: in gear; high gear.