Wiktionary
n. 1 A small gun that propels a pellet by using a compressed spring, rather than an explosion of gunpowder or other means. 2 A low-power air pistol.
Usage examples of "pellet gun".
He was carried back into the main room where the half-men had eaten their porridge, where Keeper's friend had been killed by the gas pellet gun in the chief's hand.
The battle became hand-to-hand, a leaderless riot, where ax or dagger or quarterstaff was more useful than fire-beam or pellet gun.
Then I remember that my own pellet gun was employed chiefly to raise welts on the broad pimply shoulders of one Buster Walsh, a teenage neighbor who occasionally beat me up at the school bus stop.
She hurled her empty, useless pellet gun at the closest lizardlike alien with such force that it smashed open the thing's head.
Maybe it's only an air pistol or something, a pellet gun, he doesn't want you to know he has.