(also per mil)
One part in every thousand.
- Isotopic concentrations were expressed as delta values in per mill.
- He says the loss of sales per day for the industry is around 2 per day per mill.
- According to the bylaw, the levy will be one per mill of the value of the animal.
Late 17th century: Latin.
For editors and proofreaders
Syllabification: per mill
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