capsule medical definition

1. A fibrous, membranous, or fatty sheath that encloses an organ or part, such as the sac surrounding the kidney or the fibrous tissues that surround a joint.
2. A small soluble container, usually made of gelatin, that encloses a dose of an oral medicine or a vitamin.
3. The thin-walled, spore-containing structure of mosses and related plants.

Related Forms:

• capsular adjective