Coccyx definition in medical terms

Coccyx is the tailbone in humans, the final segment of the vertebral column. Tailbone is also found in apes, and certain other mammals such as horses, dogs, cats, and goats.

The coccyx articulates above the sacrum; and is formed of either three, four or five rudimentary vertebrae.

  • In human anatomy, coccyx is known as tailbone
  • In animals with bony tails, coccyx is known as tailhead
  • In bird anatomy, coccyx is identified as tailfan

This medical dictionary page, provides definitions of the medical term “coccyx“, used in medicine.


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