pellet

Short definition from Wiktionary

Noun

1. 1
   A small, compressed, hard chunk of matter.
2. 2
   A lead projectile used as ammunition in rifled air guns.
3. 3
   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.
4. 4
   A roundel sable (black circular spot).
5. 5
   One of the short conductive tubes in a Pelletron particle accelerator.

Verb

1. 1
   To form into pellets.
2. 2
   To strike with pellets.