Glōt'tis, n.

n. [Gr. γλωττίς, γλωσσίς, from γλῶττα, γλῶσσα, the tongue; Fr. glotte.] (Anat.) The narrow opening at the upper part of the larynx, and between the vocal chords, which, by its dilatation and contraction, contributes to the modulation of the voice.