- a small triangular bone forming the lower extremity of the spinal column in humans, consisting of four ankylosed rudimentary vertebrae.
- a corresponding part in certain animals.
Origin of coccyx
1605–15; < New Latin < Greek kókkyx cuckoo, from its resemblance to a cuckoo's beak
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for coccygeal
In the pig, it also takes origin higher up from the sacro-sciatic ligament and the coccygeal aponeurosis.
In the pig, and especially in the horse, it passes further upwards, to arise from the aponeurosis of the coccygeal muscles.
The number and size of the coccygeal vertebr vary, apparently in correlation with the increased size of the tail.
- a small triangular bone at the end of the spinal column in man and some apes, representing a vestigial tail
C17: from New Latin, from Greek kokkux cuckoo, of imitative origin; from the likeness of the bone to a cuckoo's beak
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for coccygeal
1610s, from Latin coccyx, from Greek kokkyx "cuckoo" (from kokku, like the bird's English name echoic of its cry), so called by ancient Greek physician Galen because the bone in humans supposedly resembles a cuckoo's beak.
Online Etymology Dictionary, © 2010 Douglas Harper
- Relating to the coccyx.
- The small triangular bone located at the base of the spinal column, formed by the fusion of four rudimentary vertebrae, and articulating above with the sacrum.tailbone
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A small triangular bone at the base of the spine in humans and apes. It is composed of several fused vertebrae. Also called tailbone
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.