This was a new word for me: numismatics, the study of coins.
And the related word numismatists, people who study or collect coins.
I found this word in one of Stephen King’s short stories (just finished reading Full Dark, No Stars) and was surprised I had never come across it before, despite coin collectors being commonplace. If I had to guess the meaning, I would have guessed it had something to do with numbers or maths. I suppose coins are connected to numbers.
Ruth Livingstone 