Coc·cyg'e·al adjective (Anat.) Of or pertaining to the coccyx; as, the coccygeal vertebræ. Coccygeal glands (Zoology) , glands situated at the base of the tail of birds. They secrete the oil with which the plumage is dressed. Found on http://www.encyclo.co.uk/webster/C/101
Coccygeal: Referring to the coccyx, the small tail-like bone at the bottom of the spine, that is made up of 3-5 (average of 4) rudimentary vertebrae. There is a coccygeal nerve that originates in the spinal cord and emerges at the level of the coccyx. Found on http://www.medterms.com/script/main/art.asp?articlekey=18051