glisters

/G L IH1 S T ER0 Z/
noun
  1. 1

    A medicine applied via the rectum; an enema or suppository.

noun
  1. 1

    A brilliant flash; a glint

Source: https://en.wiktionary.org/wiki/clyster, https://en.wiktionary.org/wiki/glister, https://en.wiktionary.org/wiki/glisters