Definitions

1. noun

A closed capsule or sac, typically filled with a liquid or semi-solid substance, especially one that forms on the skin or in a gland or organ, often as a result of infection or inflammation.

“The doctor discovered a cyst on her chin that had been causing her pain for weeks.”

2. noun

A mass of cells that is not normally present in the body, especially one that has the potential to become cancerous.

“The patient’s cyst was removed surgically to prevent it from turning into a tumor.”

3. noun

A closed container or compartment, especially in a mechanical device.

“The engine had a small cyst that was causing the car to stall.”