Orthopaedics · Skeletal System · Easy
Sacrum
Meaning: Triangular bone of five fused vertebrae forming the back of the pelvis between the hip bones.
In practice: It wedges between the hip bones like a keystone, giving form closure to the joints linking spine and pelvis.
Quick check
Two questions on related orthopaedics words.
Which word means: A partial dislocation where joint surfaces remain in some contact.
Answer: Subluxation
Which word means: A bone infection, usually caused by bacteria.
Answer: Osteomyelitis
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