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Definitions

coccyx

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


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

In the adult, this fetal curvature is retained in two regions of the vertebral column as the thoracic curve, which involves the thoracic vertebrae, and the sacrococcygeal curve, formed by the sacrum and coccyx.

From Textbooks • Jun. 19, 2013

The adult vertebral column consists of 24 vertebrae plus the sacrum and coccyx.

From Textbooks • Jun. 19, 2013

A lady complained of pain in her rectum continuously; the coccyx was also quite tender to the touch.

From New, Old, and Forgotten Remedies: Papers by Many Writers by Anshutz, Edward Pollock