Part Per Million

**Semantic type:** Quantitative Concept

**Definition:** A unit of proportion equal to 10E-6.

**Synonyms:** - PART PER MILLION - PPM - Part per Million - Per Million - [ppm] - [ppm] - [ppm] - [ppm] - [ppm] - [ppm] - part per million - part per million - parts per million - parts per million - parts per million - ppm - ppm