Definition of "permille" []

• A part or other object per thousand. (noun)

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• "It should have small effect in distance 5 billion years ago vs. today. relatively not a big thing, less than permille of mass per 10 billion years"
• "Typically uncooled particle beams have dimensions in the mm-cm range and momentum spreads in the permille-percent range."
• "» while composing the percent sign with the letter O results in the permille sign ‰."