sacrumnoun [ C ]
uk/ˈseɪ.krəm/us/ˈsæk.rəm/plural sacra sacrums specializeda triangle-shaped bone at the base of the lower back above the coccyx (= a small bone at the base of the spine)
Thesaurus: synonyms and related words
Bone structures
- acetabular
- acetabulum
- acromial
- acromioclavicular
- acromion
- breastbone
- coccyx
- iliac
- ilium
- intercarpal
- intercondylar
- intercostal
- interosseous
- kneecap
- sacroiliac
- sacrospinous
- sacrotuberous
- sagittal
- scaphoid
- trapezium
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