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coccyx

[kok-siks] / ˈkɒk sɪks /
NOUN
small of the back
Synonyms


Example Sentences

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The boy was fifteen, skinny, almost malnourished, so that the hip bones and coccyx stood out sharply.

From The Wall Street Journal ● Nov. 11, 2025

Following this evolutionary split, the group of apes that includes present-day humans evolved the formation of fewer tail vertebrae, giving rise to the coccyx, or tailbone.

From Science Daily ● Feb. 28, 2024

The coccyx is typically 3–4 vertebrae that fuse into one.

From Textbooks ● Jun. 9, 2022

The spinal column is composed of the seven cervical vertebrae, the nine thoracic vertebra, the four lumbar vertebrae, the sacrum, and the coccyx.

From Textbooks ● Jan. 1, 2015

This fasciculus, long and narrow, takes origin from the summit of the sacrum, or the coccyx, and goes to partake of the femoral insertions of the muscle which it accompanies.

From Artistic Anatomy of Animals by ?douard Cuyer

The twins are joined only by the latero-posterior aspects of the sacra and coccyges, so that the two individuals are placed almost back to back.

From Essays In Pastoral Medicine by Austin ?Malley

They are joined at the coccyges and sacra, and the spinal columns have nearly the same axis.

From Essays In Pastoral Medicine by Austin ?Malley


Vocabulary lists containing coccyx

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