Definition, Meaning & Synonyms
ppm
Noun
/ˈpiː pī ˈɛm/
Definition
PPM stands for ‘parts per million,’ a unit of measurement often used to describe the concentration of something within a solution or in the atmosphere.
Examples
- The water sample had a lead concentration of 15 ppm.
- In environmental studies, carbon dioxide levels are often measured in ppm.
Meaning
It indicates how many parts of a substance are present in one million parts of another substance, typically used in scientific contexts.
Synonyms
- concentration
- measurement
- ratio
