cysts

/sɪsts/

IPA: /S IH1 S T S/

noun
  1. 1

    A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ.

  2. 2

    Of or pertaining to the urinary bladder or gall bladder (in compounds).

Source: https://en.wiktionary.org/wiki/cyst, https://en.wiktionary.org/wiki/cysts