Medical Definition of Cyst

Cyst: A closed sac or capsule, usually filled with fluid or semisolid material.


Last Editorial Review: 6/9/2016

Skin Pictures Slideshow: Adult Skin Problems

Search MedTerms:



    Back to MedTerms online medical dictionary A-Z List
    Pill Identifier Tool

    Need help identifying pills and medications?
    Use the pill finder tool on RxList.

    Health Solutions From Our Sponsors