external opening or orifice of the urethra through which urine and seminal fluid (in males only) leave the body; in males the meatus presents as a vertical slit normally positioned at the tip of glans penis; in females the meatus is located between the clitoris and the vagina in the vulvular vestibule of the female genitalia[MP]. [ http://en.wikipedia.org/wiki/Urinary_meatus ]