Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A small triangular bone at the base of the spinal column in humans and other apes, consisting of several fused rudimentary vertebrae.

from The Century Dictionary.

  • noun In human anatomy, the part of the spinal column consisting of the last four bones, the caudal vertebræ or tail-bones, which are stunted and usually ankylosed together. See cut under skeleton.
  • noun In comparative anatomy and zoology, the caudal vertebræ, when few and small, or ankylosed together; the bony tail itself, when short, as in a bird.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Anat.) The end of the vertebral column beyond the sacrum in man and tailless monkeys. It is composed of several vertebræ more or less consolidated.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The final fused vertebrae at the base of the spine.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the end of the vertebral column in humans and tailless apes

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin coccȳx, from Greek kokkūx, cuckoo, coccyx (from its resemblance to a cuckoo's beak).]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek κόκκυξ (kokkyx, "cuckoo"), referring to the curved shape of a cuckoo's beak when viewed from the side.

Examples

Comments

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  • I really recommend that you don't go running on smooth tiles while wearing socks on a rainy day. Sitting down suddenly and hard on your tail bone when your feet go from under you hurts!

    November 10, 2008

  • First word that I found with random word after listing geococcyx. *wonders if this is part of bilby's trap*

    December 11, 2008

  • See iroquoisy.

    December 11, 2008

  • Public transport always leaves me with a sore one of these.

    August 13, 2009