the.com/milling
The art of grinding solid things into smaller, more useful things — coins included.
means Processing material by grinding, cutting, or rotating it through a machine, from grain to metal.
from From Latin mola, the millstone, via Old English mylen — the grinding stone that fed civilizations before it fed factories.
Coin edgesThose ridges are milling, invented to stop coin shaving.
Crowd senseMilling about borrows the slow churn of grindstones.
Modern metalCNC milling carves jet engines to micron precision.