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sacrum

sacrum

4 8.4
A large triangular bone at the base of the spine that joins it to the hip bones
  • noun
  • /ˈseɪkrəm/
  • Specialized
translation icon : sacro
  • The pelvis is a ring structure made up of three bones: the sacrum and two innominate bones.
  • sacrum and innominate
  • sacrum and ischium

It was like it was mid back and now it's like around where the sacrum is.

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Examples

  • After the accident, the doctors took X-rays to check for any fractures in the sacrum.

  • The pelvic ring is formed by the connection of the sacrum to the innominate bones at the sacroiliac (SI) joints and the symphysis pubis.

    Academic text (2006)
  • I feel like my sacrum is really tight.

  • I broke my sacrum while I was pregnant, and after giving birth, it broke more.

    Blog text (4)
  • In Ambulocetus, the sacrum consists of four vertebrae that are fused.

    Academic text (2001)
  • For example, debilitated patients confined to a nursing home bed are prone to the development of ulcers over the sacrum and ischium areas.

    Academic text (1999)
  • The sacrum is located at the base of the spine and plays a key role in the structure of the pelvis.

  • During the anatomy lesson, we learned that the sacrum is formed from five fused vertebrae.

How Big

pelvis
  • Specialized
71 4.4
sacrum
  • Specialized
4 8.4
lumbar vertebra
  • Specialized
1 6.1
thoracic vertebra
  • Specialized
2 6.1
cervical vertebra
  • Specialized
5 6.5

Surface Forms

sacrum singular
sacra plural

Etymology

Sacrum comes from the Latin sacer, meaning 'sacred' or 'holy', because ancient people called it the 'sacred bone' and sometimes used it in religious rites. So sacrum is an easy way to remember the large bone at the base of the spine that connects the spine to the hips.