superior aperture of minor pelvis


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aperture

 [ap´er-chur]
inferior aperture of minor pelvis (inferior aperture of pelvis) pelvic outlet.
numerical aperture an expression of the measure of efficiency of a microscope objective.
superior aperture of minor pelvis (superior aperture of pelvis) pelvic inlet.

superior aperture of minor pelvis

an opening bounded by the crest and pecten of the pubic bones, the arch-shaped lines of the ilia, and the anterior margin of the base of the sacrum.
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