Definition of Coccyx

1. Noun. The end of the vertebral column in humans and tailless apes.

Exact synonyms: Tail Bone
Generic synonyms: Bone, Os
Group relationships: Back, Backbone, Rachis, Spinal Column, Spine, Vertebral Column, Hip, Pelvic Arch, Pelvic Girdle, Pelvis
Terms within: Caudal Vertebra, Coccygeal Vertebra
Derivative terms: Coccygeal

Definition of Coccyx

1. n. The end of the vertebral column beyond the sacrum in man and tailless monkeys. It is composed of several vertebræ more or less consolidated.

Definition of Coccyx

1. Noun. The final fused vertebrae at the base of the spine. ¹

¹ Source:

Definition of Coccyx

1. a bone of the spine [n -CYGES or -CYXES]

Medical Definition of Coccyx

1. The last bone of the spinal column, sometimes referred to as man's vestigial tail. The last portion of the vertebral column just below the sacrum. (27 Sep 1997)

Lexicographical Neighbors of Coccyx

coccygeal plexus
coccygeal segments of spinal cord
coccygeal sinus
coccygeal vertebra
coccygeal vertebrae
coccygeal whorl
coccyx (current term)
cochain complex
cochain complexes

Literary usage of Coccyx

Below you will find example usage of this term as found in modern and/or classical literature:

1. Anatomy, Descriptive and Surgical by Henry Gray (1901)
"Occasionally, a synovial membrane is found when the coccyx is freely movable, ... The different segments of the coccyx are connected together by an ..."

2. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1874)
"Society of Paris (May 28th, 1873), observed that long since he had remarked that resection of the coccyx facilitated the discovery of the inferior extremity ..."

3. Transactions by Homoeopathic Medical Society of the State of New York (1871)
"Pressure, as if with a sharp point, on the coccyx; pain in the middle of the back, ... Dull drawing in the coccyx in the evening; violent itching of the ..."

4. A Practical treatise on fractures and dislocations by Frank Hastings Hamilton (1891)
"At a late period of life, later in the female than in the male, the coccyx is united by bone to the sacrum. These facts render it apparent that a true ..."

5. A Practical treatise on fractures and dislocations by Lewis Atterbury Stimson (1899)
"FRACTURE OF THE coccyx. There is but little definite knowledge concerning this lesion. The first mention of it appears to be that of Cloquet in the ..."

6. A Text Book of Anatomy, and Guide in Dissections: For the Use of Students of by Washington R. Handy (1854)
"The anterior or pelvic surface of the coccyx is smooth, concave, ... The coccyx is light and spongy. Its development is from four points, one to each piece. ..."

7. Obstetrics: The Science and the Art by Charles Delucena Meigs (1856)
"Two styloid processes ascend from the posterior lateral surfaces to rest upon the back part of the apex of the sacrum, and prevent the point of the coccyx ..."

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