permillage
/pərˈmɪlɪdʒ/
noun
- A proportion or rate expressed as parts per thousand, often used in statistics, finance, or science.
- The permillage of salt in the seawater sample was 35 parts per thousand.
- The birth rate in that region is given as a permillage of the total population.
- In some countries, alcohol content is measured by permillage rather than percentage.