You searched for: “glottis
1. The long opening between the vocal cords at the upper part of a vertebrate's windpipe larynx.

The glottis is open during breathing but is closed by the epiglottis during swallowing.

2. The vocal apparatus of the larynx; that is, all of the anatomy of the larynx that is involved in producing the voice in a human or vertebrate animal.
This entry is located in the following unit: glotto-, glot-, -glott + (page 1)