ring gear
Engineering
noun
A gear in the form of a ring, having teeth on its inner circumference; (in later use) such a gear or (later) any gear on the flywheel of an internal-combustion engine which is driven by the pinion of a starter motor, so communicating power from the motor to the engine.
Origin
Mid 19th century; earliest use found in U.S. Patents.
- the Outer House of the Court of Session
- the Ozarks
- the Pacific
- the Pale
- the Pamirs
- the Pandects
- the Paralympics
- the Paris Commune
- the Parquet
- the Paschal Lamb
- the Passion
- the path of least resistance
- the patter of tiny feet
- the pen is mightier than the sword
- the Pennines
- the penny dropped
- the People
- the pit of one's (or the) stomach
- the plot thickens
- the Plough
- the Poconos
- the point of no return
- the poor man's ——
- the Pope
- the pot calling the kettle black