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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

Around the age of 70, the sacrum and the coccyx may fuse together.

From Textbooks • Jun. 9, 2022

The adult vertebral column comprises 26 bones: the 24 vertebrae, the sacrum, and the coccyx bones.

From Textbooks • Jun. 9, 2022

Our coccyx is a vestige of the tail of animals.

From The Sexual Question A Scientific, psychological, hygienic and sociological study by Forel, Auguste