A Sprengel pump is a device used to create vacuum conditions for scientific experiments or industrial processes. However, there are several synonyms for the term "Sprengel pump" that can be used interchangeably. One such synonym is the "Sprengel mercury pump", as it utilizes a column of mercury to generate the vacuum. Another synonym is the "high vacuum Sprengel pump", which emphasizes the pump's ability to achieve extremely low pressure levels. Furthermore, the term "mercury vacuum pump" is also often employed as a synonym, as it highlights the key element in the pump's operation. Regardless of the synonym used, all variations refer to the same apparatus that is crucial in creating vacuum conditions.