Wiktionary
n. A device with two jaw-like pincers which is used to remove staples
Wikipedia
A staple remover is a device that allows for the quick removal of a staple from a material without causing damage. The best-known form of staple remover, designed for light- gauge staples, consists essentially of a) two opposing, pivot-mounted pairs of thin, steep wedges and b) a spring that returns the device to the open position after use. Although a simple metal wedge can be used for the same purpose, and although some staplers (especially small ones about long) feature such a wedge at their hinge end, use of the wedge tends to tear fragile papers.
Usage examples of "staple remover".
If nine-year-old Randy Waterhouse had been able to look into the future and see himself in this career, he would have been delighted beyond measure: the primary tool of the Interlibrary Loan Department was the Staple Remover.
He had gone so far as to steal a staple remover from an untended desk at church and then incorporate it into an Erector-set robot hunter-killer device with which he terrorized much of the neighborhood.
When you threw that staple remover, I could've leaned towards or away from it to make my reach more convenient.
Just behind them are a couple of paper clips--the plastic, triangular type--and a rusty staple remover whose points are covered with something that looks like old pocket lint.