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[teyl-bohn] /ˈteɪlˌboʊn/
noun, Anatomy
the coccyx.
1540-50; tail1 + bone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for tailbone
  • Osborn based this supposition on what he thought was a change in tailbone anatomy about halfway down the organ's length.
  • He was experiencing some dizziness following the play, but those symptoms cleared up and his tailbone injury lasted longer.
  • Helps reduce the lower back pain, specially in the tailbone.
  • She continues to complain of a burning pain at her tailbone and a heavy feeling in her legs.
  • Body length was measured from the hairless patch on the nose along the body contour to the tip of the tailbone.
  • The coccyx, or tailbone, has one vertebrae and nerve root.
tailbone in Medicine

tailbone tail·bone (tāl'bōn')
See coccyx.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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tailbone in Science
See coccyx.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for tailbone

tagging crew

noun phrase

: Frighteningly aggressive panhandlers. ''Tagging crews'' that cover a city with graffiti (1990s+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Encyclopedia Article for tailbone


curved, semiflexible lower end of the backbone (vertebral column) in apes and humans, representing a vestigial tail. It is composed of three to five successively smaller caudal (coccygeal) vertebrae. The first is a relatively well-defined vertebra and connects with the sacrum; the last is represented by a small nodule of bone. The spinal cord ends above the coccyx. In early adulthood the coccygeal vertebrae fuse with each other; in later life the coccyx may fuse with the sacrum. A corresponding structure in other vertebrates, such as birds, may also be called a coccyx.

Learn more about coccyx with a free trial on
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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