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We found 17 dictionaries with English definitions that include the word parts per million:
Click on the first link on a line below to go directly to a page where "parts per million" is defined.

General (3 matching dictionaries)

1. parts per_million: Collins English Dictionary [home, info]
2. Parts-per-million, Parts per million: Wikipedia, the Free Encyclopedia [home, info]
3. Parts per million: Dictionary/thesaurus [home, info]

Business (2 matching dictionaries)

4. Parts Per_Million (PPM): Construction Term Glossary [home, info]
5. parts per_million (PPM): BusinessDictionary.com [home, info]

Computing (2 matching dictionaries)

6. parts per_million (PPM): I T Glossary [home, info]
7. Parts per million: Encyclopedia [home, info]

Medicine (1 matching dictionary)

8. parts per_million: Medical dictionary [home, info]

Science (3 matching dictionaries)

9. Parts per Million: Extragalactic Astronomy [home, info]
10. parts per_million: General Chemistry Online [home, info]
11. Parts per_million (ppm): NRC Glossary of Nuclear Terms -- [home, info]

Tech (6 matching dictionaries)

12. Parts per million: AUTOMOTIVE TERMS [home, info]
13. PARTS PER MILLION: Energy Terms [home, info]
14. parts_per_million (ppm): Canadian Soil Information System [home, info]
15. PARTS PER MILLION: Lake and Water Word Glossary [home, info]
16. parts per_million: Schlumberger Oilfield Glossary [home, info]
17. parts per_million: Water-Science Glossary of Terms [home, info]

▸ Words similar to parts per million ▸ Usage examples for parts per million ▸ Idioms related to parts per million (New!) ▸ Words that often appear near parts per million ▸ Rhymes of parts per million ▸ Invented words related to parts per million