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coccyx

Line breaks: coc¦cyx
Pronunciation: /ˈkɒksɪks
 
/

Definition of coccyx in English:

noun (plural coccyges /-ɪdʒiːz/ or coccyxes)

A small triangular bone at the base of the spinal column in humans and some apes, formed of fused vestigial vertebrae.
Example sentences
  • The sacrum itself represents 5 fused bones, and the coccyx another vestigial 2-3 or more - the remains of the ancestral tail.
  • The spinal column is composed of seven cervical vertebrae, twelve thoracic vertebrae, five lumbar vertebrae, the bony sacrum, and the coccyx.
  • Many of my patients have pressure ulcers on the coccyx or sacrum.

Origin

late 16th century: via Latin from Greek kokkux 'cuckoo' (because the shape of the human bone resembles the cuckoo's bill).

Derivatives

coccygeal

1
Pronunciation: /kɒkˈsɪdʒɪəl/
adjective
Example sentences
  • The usual grouping formula of 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal vertebrae is found in only about 20% of individuals studied.
  • The lumbosacral plexus is formed by the union of the anterior primary divisions of the lumbar, sacral, and coccygeal nerves.
  • The fifth sacral and the coccygeal nerves (when present) are located within the dural cavity.

Definition of coccyx in:

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