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We found 40 dictionaries with English definitions that include the word atomic number:
Click on the first link on a line below to go directly to a page where "atomic number" is defined.

General (21 matching dictionaries)

1. atomic number: Merriam-Webster.com [home, info]
2. atomic number: Oxford Dictionaries [home, info]
3. atomic number: American Heritage Dictionary of the English Language [home, info]
4. atomic number: Collins English Dictionary [home, info]
5. atomic number: Vocabulary.com [home, info]
6. atomic number: Macmillan Dictionary [home, info]
7. atomic number: Cambridge Advanced Learner's Dictionary [home, info]
8. atomic number: Wiktionary [home, info]
9. atomic number: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. atomic number: Infoplease Dictionary [home, info]
11. atomic number: Dictionary.com [home, info]
12. atomic number: UltraLingua English Dictionary [home, info]
13. Atomic Number, Atomic number: Wikipedia, the Free Encyclopedia [home, info]
14. atomic number: Rhymezone [home, info]
15. atomic number: Free Dictionary [home, info]
16. atomic number: Mnemonic Dictionary [home, info]
17. atomic number: WordNet 1.7 Vocabulary Helper [home, info]
18. atomic number: LookWAYup Translating Dictionary/Thesaurus [home, info]
19. atomic number: Dictionary/thesaurus [home, info]

Business (2 matching dictionaries)

20. atomic number: Legal dictionary [home, info]
21. atomic number: Financial dictionary [home, info]

Computing (1 matching dictionary)

22. atomic number: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

23. atomic number: online medical dictionary [home, info]
24. atomic number: Medical dictionary [home, info]

Science (9 matching dictionaries)

25. Atomic Number: Chemistry Dictionary [home, info]
26. Atomic Number: Eric Weisstein's World of Physics [home, info]
27. Atomic Number: Extragalactic Astronomy [home, info]
28. atomic number: General Chemistry Online [home, info]
29. Atomic number: NRC Glossary of Nuclear Terms -- [home, info]
30. atomic number: UNCChem Glossary [home, info]
31. atomic number: How Many? A Dictionary of Units of Measurement [home, info]
32. ATOMIC NUMBER: Zoom Astronomy Glossary [home, info]

Tech (5 matching dictionaries)

34. atomic number: Electronics [home, info]
35. Atomic Number: Building pathology glossary [home, info]
36. atomic number: Glossary of Meteorology [home, info]
37. Atomic Number: Explosives [home, info]
38. ATOMIC NUMBER: Power Engineering [home, info]

(Note: See atomic_numbers for more definitions.)

Quick definitions from WordNet (atomic number) ▸ noun:  the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element ▸ Also see atomic_numbers ▸ Words similar to atomic number ▸ Usage examples for atomic number ▸ Words that often appear near atomic number ▸ Rhymes of atomic number ▸ Invented words related to atomic number