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Entrance into a canal or hollow organ
For usage of the term in Christian religion and music, see introit.
An introitus is an entrance into a canal or hollow organ. The vaginal introitus is the opening that leads to the vaginal canal.
References
John H. Dirckx (1997). Stedman's Concise Medical and Allied Health Dictionary (3rd ed.). Williams and Wilkins. p. 451. ISBN0-683-23125-1.
External links
The dictionary definition of introitus at Wiktionary