Why is a dime called a dime in spoken English? Any allusions?

In the Song Dynasty, there was a small coin called a dime, which was used by later generations to refer to small money.

Token "jiao" is only one tenth of the standard currency unit "yuan", which is a small coin, so it is commonly called "jiao" as a corner. From the late Qing Dynasty to the Republic of China. At that time, Universal Ocean, that is, Silver Dollar (named Yuan Datou with Yuan Shikai's head printed on it). The unit of measurement of those silver dollars is called "circle" or "block", which is a vivid expression. Later printed paper money also followed this customary name, and the unit printed on it was also "round", which was called "block" by the people. In the early days, some paper money could be exchanged for foreign currency. ) It has always been called this, so the unit of RMB is also round. "Yuan" is a simple way of writing and only appears on coins. "Block" only appears in spoken language and daily life.

This is from the late Qing Dynasty to the Republic of China. At that time, Universal Ocean, that is, Silver Dollar (named Yuan Datou with Yuan Shikai's head printed on it). The unit of measurement of those silver dollars is called "circle" or "block", which is a vivid expression. Later printed paper money also followed this customary name, and the unit printed on it was also "round", which was called "block" by the people. In the early days, some paper money could be exchanged for foreign currency. ) It has always been called this, so the unit of RMB is also round. "Yuan" is a simple way of writing and only appears on coins. "Block" only appears in spoken language and daily life.

"Block" is because silver dollars were used before, and the unit of quantity is block.

"Mao" was originally pronounced as "milli". For the convenience of bookkeeping, "milli" is often saved as "gross". Over time, practice was unsuccessful. In some places, "milli" is pronounced as "Mao".