pelvic brim

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the upper edge of a bowllike structure.
pelvic brim pelvic inlet.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Farlex Partner Medical Dictionary © Farlex 2012

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
Medical Dictionary, © 2009 Farlex and Partners