vestibule

[Lat. vestibulum, prob. from a root ve -away, apart, and stabulum =an abode; Fr. vestibule.] I. Ord. Lang.: A pa age, hall, or ante-chamber next the outer door of a house, and from which doors open into the various inner rooms of a house; a porch, a lobby, a hall. II. Anatomy : 1. A chamber; as the vestibule of the ear, which is the central chamber of the labyrinth; as the vestibule of the aorta, which is a small compart ment constituting the part of the ventricle which adjoins the aorta. 2. An angular interval; as, the vestibule of the vulva, which is an angular interval between the nymphe.