Tailbone

(TAYL-bone) The small bone at the bottom of the spine. The sacral and coccygeal vertebræ consist at an early period of life of nine separate segments which are united in the adult, so as to form two bones, five entering into the formation of the sacrum, four into that of the coccyx. Sometimes the coccyx consists of five bones; occasionally the number is reduced to three.

Also called coccyx.

Tailbone Resources
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