[TA] the gap between the anteromedial borders of the pelvic diaphragm (pubococcygeus muscle) through which the male urethra or female urethra and vagina and the (deep) dorsal vein of the penis or clitoris pass; outside of these traversing structures, the urogenital hiatus is closed by the perineal membrane. SYN: hiatus urogenitalis [TA].
