sacrum
Noun
Meaning
That part of the vertebral column which is directly connected with, or forms a part of, the pelvis.
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The lab file on Geoff Campbell identified fragments of his scapula, femur and sacrum – and those fragments were tiny.
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.
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.
Sacer, sacra, sacrum omits its e while miser, misera, miserum keeps it.
Similarly, the sacrum is usually counted as a single bone, rather than five fused vertebrae.
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.