形容词

1. The palace was built in the fifteenth century.
这宫殿建于十五世纪。

1. 第十五：fifteenfold 十五倍的 | fifteenth 第十五 | fifteenyears 十五年

2. (第十五军团)：Twelfth (第十二军团),387,826 | Fifteenth (第十五军团),1037,1105 | Sixteenth(第十六军团),762

3. 第十五的：fifteen 十五;十五个 | fifteenth 第十五的,15 | fifth 第五 n.五分之一

1. 第十五
The fifteenth item in a series is the one that you count as number fifteen.

e.g. ...the invention of the printing press in the fifteenth century.
15 世纪印刷机的发明

noun

1. position 15 in a countable series of things