millesimal

/mɪˈlɛsɪməl/
adjective
  1. Relating to or consisting of thousandths; divided into a thousand parts.
    • The millesimal scale on the ruler allowed for very precise measurements.
    • In some ancient systems, taxes were calculated using a millesimal fraction of property value.
    • The jeweler used a millesimal fineness system to describe the purity of gold.
Synonyms
noun
  1. A thousandth part, especially of something measured or valued.
    • He calculated the tax as a few millesimals of the property's assessed value.
    • A millesimal of the total weight was barely noticeable on the scale.
    • The recipe called for a millesimal of a gram of a rare spice.
What does "millesimal" mean? | whatsthatwordmean | whatsthatwordmean