Sacrum Sacrum The sacrum ( or ; plural: "sacra" or "sacrums"), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of sacral vertebrae S1S5 between 18 and 30years of age. The sacrum is situated at the upper, back part of the pelvic cavity, between the two wings of the pelvis. It forms joints with four other bones. The two projections at the sides of the sacrum are called the alae (wings), and articulate with the ilium at the L-shaped sacroiliac joints. The upper part of the sacrum connects with the last
Ver sacrum of the Roman people ("iussu populi"), then he specified a long series of unfavourable events and circumstances which were as a rule regarded as invalidating but would not be so as far as the present "votum" was concerned in the case they happen. The overall authenticity of the formula preserved in Livy's passage has been noticed by Dumézil while the exceptional theological and juridical prudence showed by Lentulus in ensuring that both fraud and ignorance of private citizens would not affect the validity of the "sacrum" and harm the Roman people has been remarked by Bouché-Leclercq. Ver sacrum Ver sacrum