superior pelvic aperture

pel·vic in·'let

[TA]
the upper opening of the true pelvis, bounded anteriorly by the pubic symphysis and the pubic crest on either side, laterally by the iliopectineal lines, and posteriorly by the promontory of the sacrum.

su·pe·ri·or pel·vic ap·er·ture

(sŭ-pēr'ē-ŏr pel'vik ap'ĕr-chŭr)
The upper opening of the true pelvis, bounded anteriorly by the pubic symphysis and the pubic crest on either side, laterally by the iliopectineal lines, and posteriorly by the promontory of the sacrum.
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