regulator in Wingdings is ❒︎♏︎♑︎◆︎●︎♋︎⧫︎□︎❒︎

A contrivance for regulating and controlling motion, as: (a)The lever or index in a watch, which controls the effective length ofthe hairspring, and thus regulates the vibrations of the balance. (b)The governor of a steam engine. (c) A valve for controlling theadmission of steam to the steam chest, in a locomotive.