| coccyx | <anatomy> 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) |
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| muscles of coccyx | The muscles of the coccyx considered as a group, including the musculus coccygeus and the inconstant ventral and dorsal sacrococcygeal muscles. Synonym: musculi coccygei. (05 Mar 2000) |
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