The tenth item in a series is the one that you count as number ten.
FRACTION
十分之一
A tenth is one of ten equal parts of something.
例句
We received only two tenths of an inch of rain during the entire month of June.整個 6 月，我們這里的降水量只有0.2英寸。
英漢詞典釋義
pron.
第十(個)
He plunged from a tenth floor window.他從10 樓的窗戶跳下。He was down on all cards at the middle of the tenth round.到第十回合的中途,他在所有裁判記錄卡上分數還是落后。He bought her a diamond ring on their tenth wedding anniversary.他們結婚10周年紀念，他給她買了一枚鉆戒。
十分之一
A dime is a tenth of a dollar.一角銀幣是十分之一美元。
adj.
第十的,第十個的
the tenth day of the strike罷工的第十天
英英詞典釋義
Noun
1. a tenth part; one part in ten
2. position ten in a countable series of things
Adjective
1. coming next after the ninth and just before the eleventh in position