| transverse diameter | The transverse diameter of the pelvic inlet, measured between the terminal lines. Synonym: diameter transversa. (05 Mar 2000) |
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| external conjugate diameter | The distance in a straight line between the depression under the last spinous process of the lumbar vertebrae and the upper edge of the pubic symphysis. Synonym: Baudelocque's diameter, external conjugate diameter. (05 Mar 2000) |