- 1. [TA] The smaller of the two membranous sacs in the vestibule of the labyrinth, lying in the spherical recess; it is connected with the cochlear duct by a very short tube, the ductus reuniens, and with the utriculus by the beginning of the ductus endolymphaticus and the ductus utriculosaccularis that joins it. 2. The immense bag-shaped structure formed by peptidoglycans as part of the cell wall of certain microorganisms. SYN: sacculus [TA], sacculus proprius, sacculus vestibuli. [L. sacculus]- laryngeal s. [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, s. of larynx.
* * *sac·cule 'sak-(.)yü(ə)l n a little sac specif the smaller chamber of the membranous labyrinth of the ear
* * *n.the smaller of the two membranous sacs within the vestibule of the ear: it forms part of the membranous labyrinth. It is filled with fluid (endolymph) and contains a macula. This responds to gravity and relays information to the brain about the position of the head.
* * *sac·cule (sakґūl) [L. sacculus] 1. sacculus. 2. sacculus vestibularis.
Medical dictionary. 2011.