尿にょう道どう球きゅうMeanings1nounbulb of penis; urethral bulbanatomyAnatomical term for the bulb of the penis, also called the urethral bulb.尿にょう道どう球きゅうは男だん性せいの尿にょう道どうの起き始し部ぶにある膨ぼう大だい部ぶである。The urethral bulb is the expanded part at the beginning of the male urethra.