coin collecting

1. He found a coin in his pocket and slipped it into her collecting tin
   他摸到口袋里有一枚硬币，便匆匆丢进她的讨钱罐。
2. Coin collecting experts say they have identified a210-year-old silver dollar that is likely the first one coined by the United States Mint.
   钱币收藏专家们称他们已经鉴定出一枚距今210年的银币，它很可能是美国造币厂铸造的第一枚硬币。
3. Stamp collecting and coin collecting are parallel hoBBies.
   集邮和收藏硬币是相似的爱好。

noun

1. the collection and study of money (and coins in particular)

   Synonym:    numismaticsnumismatologycoin collection