noun Anatomy.

the coccyx.

Nearby words

  1. tail-heavy,
  2. tail-light,
  3. tailback,
  4. tailband,
  5. tailboard,
  6. tailcoat,
  7. tailed,
  8. tailed frog,
  9. tailfirst,
  10. tailgate

Origin of tailbone

First recorded in 1540–50; tail1 + bone

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for tailbone





The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for tailbone



See coccyx.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.