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Medical Definition of Sinus reuniens
1. An obsolete term for sinus venosus. Rhomboidal sinus Sinus rhomboidalis, a dilation of the central canal of the spinal cord in the lumbar region. Synonym: rhombocele. (05 Mar 2000)
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1. An obsolete term for sinus venosus. Rhomboidal sinus Sinus rhomboidalis, a dilation of the central canal of the spinal cord in the lumbar region. Synonym: rhombocele. (05 Mar 2000)