Sacrum

Sacrum – Meaning, Definition, Synonyms and Antonyms

Sacrum is a noun that refers to a triangular bone at the base of the spine, part of the pelvis.

Meaning:

The sacrum is a triangular bone located at the base of the spine. It connects the spine to the hip bones and helps support the upper body’s weight, making it central to everyday movement like walking, standing, and climbing stairs.

Definition:

The sacrum is a key structural part of the pelvic region, linking the spine to the pelvis. It provides stability and strength so weight can transfer smoothly from the torso to the legs. The sacrum also helps protect nerves that pass through the area. Its anterior (front) side is concave, while its posterior (back) side is convex and rough.

Because it sits between the spine and the pelvis, the sacrum is often mentioned in health and movement contexts. For example, in yoga and other training, people may focus on alignment to maintain a more stable lower back. If you’re dealing with pain, a clinician may also discuss the sacrum in relation to overall posture and biomechanical support for the body.

Example Sentences:

• The sacrum forms an important connection between the spine and the pelvis, helping provide structural support.
• During her yoga practice, the instructor reminded the class to align the sacrum for better posture.
• The sacrum is made of five fused vertebrae and plays a major role in stabilizing the lower back and hips.
• An injury or inflammation around the sacrum can cause discomfort in the lower back and pelvic area.
• The sacroiliac joint, where the sacrum meets the hip bone, is crucial for balance during daily movement.
• After a long day at the desk, he felt stiffness around the sacrum when standing up.
• The physical therapist explained how improving core strength can reduce stress on the sacrum.

Sacrum Synonyms:

• Base of spine
• Sacral bone
• Pelvic bone
• Tailbone (not the same, but sometimes used loosely in casual speech)
• Sacral vertebrae
• Lower spine (general reference)
• Sacral region (area around the bone)
• Pelvic spine (informal/clinical phrasing)

Sacrum Antonyms:

Because sacrum names a specific part of the body, there are no direct medical antonyms. In vocabulary practice, antonyms here are understood as unrelated body parts that readers may contrast in general anatomy lists.

• Skull
• Cranium
• Sternum
• Clavicle
• Rib
• Femur
• Humerus
• Patella

Explore more S-words that start with the same letter, like support.