coccy or coccyg/o is a combining form that refers to “coccyx (tailbone)”.
The coccyx is a triangle-shaped piece of bone that forms the bottom end of the spine beneath the sacrum. Even though the tailbone is regarded as unnecessary in the human body, it serves a purpose in the pelvis. As an example, the coccyx is a part of a three-part support for a person in the sitting position.
