We found 39 dictionaries that define the word atomic number:

General (19 matching dictionaries)

1. atomic number: Merriam-Webster
2. atomic number: Oxford Learner's Dictionaries
3. atomic number: American Heritage Dictionary of the English Language
4. atomic number: Collins English Dictionary
5. atomic number: Vocabulary.com
6. atomic number: Cambridge Advanced Learner's Dictionary
7. atomic number: Wiktionary
8. atomic number: The Wordsmyth English Dictionary-Thesaurus
9. atomic number: Infoplease Dictionary
10. atomic number: Dictionary.com
11. Atomic Number, Atomic number: Wikipedia, the Free Encyclopedia
12. atomic number: Rhymezone
13. atomic number: FreeDictionary.org
14. atomic number: Mnemonic Dictionary
15. atomic number: TheFreeDictionary.com
16. atomic number: Longman Dictionary of Contemporary English
17. atomic number: Merriam-Webster

Business (2 matching dictionaries)

18. atomic number: Legal dictionary
19. atomic number: Financial dictionary

Computing (1 matching dictionary)

20. atomic number: Encyclopedia

Medicine (4 matching dictionaries)

21. atomic number: Merriam-Webster Medical Dictionary
22. Dorland's Illustrated Medical Dictionary (No longer online)
23. online medical dictionary (No longer online)
24. atomic number: Medical dictionary

Science (8 matching dictionaries)

25. Chemistry Dictionary (No longer online)
26. Atomic Number: Eric Weisstein's World of Physics
27. Illustrated Glossary of Geologic Terms (No longer online)
28. Atomic Number: Extragalactic Astronomy
29. Atomic number: NRC Glossary of Nuclear Terms --
30. atomic number: UNCChem Glossary
31. How Many? A Dictionary of Units of Measurement (No longer online)
32. ATOMIC NUMBER: Zoom Astronomy Glossary

Tech (5 matching dictionaries)

33. atomic number: Electronics
34. Atomic Number: Building pathology glossary
35. Glossary of Meteorology (No longer online)
36. Explosives (No longer online)
37. ATOMIC NUMBER: Power Engineering

(Note: See atomic_numbers as well.)

Definitions from Wiktionary (atomic number) ▸ noun:  (physics, chemistry) The number of protons in an atom. Symbol: Z Similar: electron number, proton number, neutron number, mass number, atomic mass number, nuclide, element number, principal quantum number, electric charge, baryon number, more... Opposite: atomic mass, atomic weight Phrases: atomic number 1, atomic number 2, atomic number 3, atomic number 4, atomic number 6, more... Adjectives: gas, metal, molecular, isotone, period, compound, chemical, purum, splitting, nascent, electrovalent ▸ Words similar to atomic number ▸ Usage examples for atomic number ▸ Idioms related to atomic number ▸ Wikipedia articles (New!) ▸ Words that often appear near atomic number ▸ Rhymes of atomic number ▸ Invented words related to atomic number