Definitions
a metric unit of length equal to one thousandth of a meter
Used in a sentence
“2001 PROOF west point MM”
“I know. We should include whatever pleases us. But I cringe at the thought of having to budget for a nice BU 1917 WL with the obverse MM if most type set collectors don't consider it a variety to include.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Tiny metric length”2 letters
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