尿にょう道どう口こうMeanings1nounurethral opening; urinary meatusanatomyAnatomical term for the external opening of the urethra.尿にょう道どう口こうは膀ぼう胱こうから体たい外がいへ尿にょうを排はい出しゅつする出で口ぐちです。The urethral opening is the exit through which urine is expelled from the bladder to the outside of the body.