mintmark

noun

a letter or other symbol on a coin that identifies the mint at which it was struck.

Origin:
1790–1800; mint² + mark¹

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet

mintmark
noun
a mark on a coin that identifies the mint where it was produced

WordNet® 3.0, © 2006 by Princeton University.
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00:10

Mintmark is always a great word to know.

So is quincunx. Does it mean:

an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

the offspring of a zebra and a donkey.

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