What is another word for epicyclic gearing?
Pronunciation: [ˌɛpɪsˈa͡ɪklɪk ɡˈi͡əɹɪŋ] (IPA) 
Epicyclic gearing, also known as planetary gearing, refers to a gear system that involves one or more central gears (known as a "sun gear"), surrounded by several outer gears (known as "planet gears"), all of which rotate around a central axis. This type of gearing is commonly used in automatic transmissions, where it allows for smooth and efficient gear changes. Other synonyms for epicyclic gearing include planetary trains, planetary drives, and planetary gearsets. In addition to its use in transmissions, epicyclic gearing can also be found in a variety of other applications, including robotics, aerospace, and industrial machinery.
