Base of sacrum | definition of base of sacrum by Medical dictionary
base of sacrum
base of sa·crum [TA]
the upper end of the sacrum that articulates with the body of the fifth lumbar vertebra in the midline plus the superior aspects of the alae on either side.
References in periodicals archive
Nakipoglu et al (2008)  have measured sacral horizontal angle (SHA) between the base of sacrum
and the horizontal plane.
BS: base of sacrum
; SCL: sacrococcygeal ligament; SH: sacral hiatus.