Noun
That part of the vertebral column which is directly connected with, or forms a part of, the pelvis.
Source: Webster's dictionaryThe lab file on Geoff Campbell identified fragments of his scapula, femur and sacrum – and those fragments were tiny. Source: Internet
The sacrum Romanum imperium (Holy Roman Empire), which lasted from 800 to 1806, claimed to have exclusively comprehended Christian principalities, and was only nominally a discrete imperial state. Source: Internet
Postcranial skeleton Life restoration of A. fragilis Allosaurus had nine vertebrae in the neck, 14 in the back, and five in the sacrum supporting the hips. Source: Internet
Sacer, sacra, sacrum omits its e while miser, misera, miserum keeps it. Source: Internet
Similarly, the sacrum is usually counted as a single bone, rather than five fused vertebrae. Source: Internet
The illium has elongated and formed a mobile joint with the sacrum which, in specialist jumpers such as ranids and hylids, functions as an additional limb joint to further power the leaps. Source: Internet