Coccygeal /(?)/

Coc·cyg·e·al

Coccygeal

a.
  1. Of or pertaining to the coccyx; as, the coccygeal vertebræ. (Anat.)

Phrases & Compounds
Coccygeal glands
, glands situated at the base of the tail of birds. They secrete the oil with which the plumage is dressed.