rec·to·coc·cyg·e·us | \ ˌrek-tō-käk-ˈsij-ē-əs 
\
\ plural rectococcygei\ -ē-ˌī \
\Medical Definition of rectococcygeus
: a band of smooth muscle extending from the coccyx to the posterior wall of the rectum and serving to retract and elevate the rectum
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