pellet

A small, compressed, hard chunk of matter.

A lead projectile used as ammunition in rifled air guns.

Compressed byproduct of digestion regurgitated by owls and many other birds of prey, which serves as a waste disposal mechanism for indigestible parts of food, such as fur and bones.

(heraldry) A roundel sable (black circular spot; also called ogress).

One of the short conductive tubes in a Pelletron particle accelerator.