• (n.) A cavity into which, in certain bryozoans, the esophagus and anus open.
(vәs-tib´u-lәm) Latin word meaning vestibule; a term used in anatomy.
Ves·tib'u·lum noun ; plural Vestibula . [ Latin , vestibule.] (Zoology) A cavity into which, in certain bryozoans, the esophagus and anus open. 
Type: Term Pronunciation: ves-tib′yū-lŭm, -lă Synonyms: vestibule
The area of the female genital tract between the vulva and the vestibular sphincter that opens into the vagina cavity and has on it's floor the opening of the urethra.