external conjugate diameter


ex·ter·nal con·ju·gate

[TA] 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(s): conjugata externa [TA], external conjugate diameter

external conjugate diameter

The anteroposterior diameter of the pelvic inlet measured externally; the distance from the skin over the upper part of the symphysis pubis to the skin over a point corresponding to the sacral promontory.See also: diameter