fifteenth/ˌfɪfˈti:nθ; `fɪf`tinθ/ pron, det 15th; next after fourteenth 第15, 第十五（个）. n one of fifteen equal parts of sth 十五分之一. For the uses of fifteen and fifteenth see the examples at five and fifth. 关於fifteen和fifteenth的用法见five和fifth词条中的示例.
牛津英汉双解词典