vestibule

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ves·ti·bule / ˈvestəˌbyoōl/ • n. 1. an antechamber, hall, or lobby next to the outer door of a building. ∎  an enclosed entrance compartment in a railroad car. 2. Anat. a chamber or channel communicating with or opening into another, in particular: ∎  the central cavity of the labyrinth of the inner ear. ∎  the part of the mouth outside the teeth. ∎  the space in the vulva into which both the urethra and vagina open.DERIVATIVES: ves·ti·buled adj.

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