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internal os

noun

: the opening of the cervix into the body of the uterus

Browse Nearby Words

internal occipital protuberance
internal os
internal phase
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Cite this Entry

“Internal os.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/internal%20os. Accessed 26 Nov. 2025.

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