Definition
noun
The outermost portion forming an entrance into the alimentary canal, bounded by lips and cheeks, and serves to receive food and initiate (mechanical) digestion.
Supplement
Word origin: Late Latin ōrālis, from Latin ōs, ōr-, mouth + Latin vestibulum, forecourt, entrance.
Synonym: vestibulum oris, vestibule of mouth.
Dictionary > Oral vestibule
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