The term REVOLVING ARM can be broken down into two words, REVOLVING and ARM. The first word, REVOLVING, is a 5 letter word that can be abbreviated to ROTOR. A ROTOR is a rotating part of a machine, such as an electric motor or an engine. The second word, ARM, refers to a mechanical ARM, which is a device used to move objects from one place to another. Together, the two words form the term REVOLVING ARM, which is a mechanical ARM that rotates around a central point. This type of ARM is often used in industrial settings, such as in robotic arms and automated assembly lines.