[TA] a small diverticulum provided with mucous glands extending upward from the ventricle of the larynx between the vestibular fold and the lamina of the thyroid cartilage; it is a vestigial structure, being a much larger structure interdigitating with the neck musculature in some of the great apes, where it serves as a resonating chamber. SYN: sacculus laryngis [TA], appendix ventriculi laryngis, Hilton sac, laryngeal pouch, saccule of larynx.
