a coin of the US and Canada worth ten cents （美國、加拿大的）十分硬幣，十分錢 Word Originlate Middle English: from Old French disme, from Latin decima pars ‘tenth part’. The word originally denoted a tithe or tenth part; the modern sense ‘ten cent coin’ dates from the late 18th cent.
Idioms
a dime a dozen (North American English)
(British English two/ten a penny)
very common and therefore not valuable 普通得不值錢；（因常見而）價值低
drop a/the dime on somebody
- (North American English, informal)
to tell the police or people in authority that somebody has done something wrong 一角錢：告訴警察或權威人士有人做錯了事 If he finds out who dropped the dime on him, they're in trouble. 如果他發現是誰給了他一分錢，他們就有麻煩了。 I'm worried if I drop a dime on this guy, he'll get fired, which I don't think he really deserves. 我擔心如果我在這個家夥身上花一毛錢，他會被解僱，我認爲他真的不值得。