Definition

Noun: A wheel with teeth or cogs around its rim, designed to mesh with another toothed part (like another wheel or a rack) to transmit motion or change its speed or direction. It is a fundamental component in many machines and gear systems.

Usage

The word "cogwheel" is used to describe a specific mechanical component. It is often synonymous with "gear," though "cogwheel" can sometimes emphasize the individual wheel with its projecting teeth (cogs), while "gear" is a broader term for the entire toothed mechanism.

Examples

• The old clock's mechanism was driven by a series of brass cogwheels.
• One broken cogwheel can cause the entire machine to jam.
• He carefully cleaned the cogwheel before reassembling the gearbox.

Advanced Usage

• As a metaphor: Sometimes used metaphorically to describe a person as a small, seemingly insignificant but necessary part of a large organization or system.
  • Example: He felt like just another cogwheel in the vast corporate machine.

Variants and Related Words

• Gear (noun): A more common general term for a toothed wheel that works with others to transmit motion. A cogwheel is a type of gear.
• Pinion (noun): A small cogwheel that engages with a larger one or with a rack.
• Sprocket (noun): A cogwheel designed to engage with a chain (like on a bicycle).

Synonyms

• Gear, toothed wheel, gearwheel.

Antonyms

There is no direct antonym, but a smooth, toothless wheel (like a pulley) serves a different mechanical function.

Related Phrases/Idioms

• A cog in the machine/wheel: An idiom describing someone who plays a small but necessary role in a large organization or process, with little individual power or recognition.
  • Example: In the factory, each worker was just a cog in the wheel.

Noun

1. a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion