We found 9 dictionaries that define the word polynuclear aromatic hydrocarbons:

General (2 matching dictionaries)

1. polynuclear aromatic hydrocarbons: Merriam-Webster
2. Polynuclear aromatic hydrocarbons: Wikipedia, the Free Encyclopedia

Business (1 matching dictionary)

3. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

4. Polynuclear aromatic hydrocarbons: Encyclopedia

Medicine (1 matching dictionary)

5. polynuclear aromatic hydrocarbons: Merriam-Webster Medical Dictionary

Science (1 matching dictionary)

6. Atmospheric Chemistry and Air Quality (No longer online)

Tech (3 matching dictionaries)

7. AUTOMOTIVE TERMS (No longer online)
8. Polynuclear Aromatic Hydrocarbons: Glossary of Terms on Engines and Emissions
9. Lake and Water Word Glossary (No longer online)

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