What does the word capsule mean?

Usage examples for capsule

  1. He broke the capsule in a towel, and held it over her face. – K by Mary Roberts Rinehart
  2. Small artery entering capsule and forming cluster of capillaries within. – Physiology and Hygiene for Secondary Schools by Francis M. Walters, A.M.
  3. All three now had their capsule pistols ready. – The Flying Legion by George Allan England