Definition of “milling”
noun:
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The notches around the edge of a coin, placed there during minting so that it can be told if some of the metal from the edge is removed. Removing metal from a coin was common practice during earlier times when coins made of precious metals circulated.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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verb:
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Present participle of mill.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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