noun. a membrane-lined duct which transports urine to the exterior from the urinary bladder. With regard to males, it progresses via the penis's corpus spongiosum and additionally operates as a channel for semen during ejaculation. With regard to, females the urethra is fewer than 4 cm long and extends almost directly to an opening anterior to the vaginal orifice.
URETHRA: "Urinary tract infections are more common in males, due to their longer tract and urethra."