Glottis
From Memory Alpha, the free Star Trek reference
In humanoid anatomy, the glottis is the space between an individual's vocal chords.
"The Klingon Glottis: Friend or Foe?" was one of the proposed themes for "Hints for Healthful Living", the Doctor's segment in Neelix's program A Briefing with Neelix. (VOY: "Investigations")
