introitus

noun

1. The entrance to a hollow organ or canal; often specifically the entrance to the vagina.

   “During NA therapy, 49 of the 54 women cleared their introitus of all Enterobacteriaceae.”

   “Now, far be it from me to add insult to injury, but how could you be so klutzy that you "missed the introitus"?”

   “There is nothing feminine about these male pseudohermaphrodites except their introitus, and they seem to be normally male otherwise.”

2. A piece of music played before a mass; a musical introduction of any sort.

   “Five have an introitus (introduction) that stands outside the isorhythmic scheme;¹⁰⁸ some of these introitus are instrumental rather than vocal […]”

   “As summarized in Example 3.14, nearly all of these introitus […]”