The quiz is the primary device of eliminating contestants across all series.
For some men, joke telling is a primary device of this kind.
It's not something that everybody necessarily needs to have, but for people who are using iPad as a primary device, this is great.
"Reproducing his work gives smartphones a whole new level of respect as the primary device for on-the-go music."
This is the primary device of detective fiction (and psychoanalysis), but all other genres use the technique as well.
This was the primary device used by oceanographers to determine water temperatures below the surface of the ocean from around 1900 to 1970.
The show's content evolved using three primary devices.
Scrubbers are one of the primary devices that control gaseous emissions, especially acid gases.
However, the company ignored these results, as it believed they were less accurate than the primary device which reported that the mirror was perfectly figured.
They are the primary devices of inputting text.