pelvic brim

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the upper edge of a bowllike structure.
pelvic brim pelvic inlet.

pel·vic in·'let

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.

pelvic brim

The bony upper edge of the true (lesser) pelvis, which is the rim of the pelvic inlet (superior pelvic aperture). The pelvic brim comprises the pubic crest and pectineal line of each pubis, the arcuate line of each ilium, the inner edge of the alae of the sacrum, and the sacral promontory. The pelvic brim is oval shaped in females and heart shaped in males.
Synonym: linea terminalis (1); pelvic opening
See also: brim