We found 26 dictionaries that define the word atomic mass:

General (18 matching dictionaries)

1. atomic mass: Merriam-Webster
2. atomic mass: Oxford Learner's Dictionaries
3. atomic mass: American Heritage Dictionary of the English Language
4. atomic mass: Collins English Dictionary
5. atomic mass: Vocabulary.com
6. atomic mass: Cambridge Advanced Learner's Dictionary
7. atomic mass: Wiktionary
8. atomic mass: Infoplease Dictionary
9. atomic mass: Dictionary.com
10. Atomic Mass (band), Atomic Mass, Atomic mass: Wikipedia, the Free Encyclopedia
11. atomic mass: Rhymezone
12. atomic mass: Stammtisch Beau Fleuve Acronyms
13. atomic mass: FreeDictionary.org
14. atomic mass: Mnemonic Dictionary
15. atomic mass: TheFreeDictionary.com
16. atomic mass: Merriam-Webster

Business (1 matching dictionary)

17. atomic mass: Legal dictionary

Computing (1 matching dictionary)

18. atomic mass: Encyclopedia

Medicine (3 matching dictionaries)

19. atomic mass: Merriam-Webster Medical Dictionary
20. online medical dictionary (No longer online)
21. atomic mass: Medical dictionary

Science (2 matching dictionaries)

22. Atomic Mass: Eric Weisstein's World of Physics
23. Atomic Mass: Material Safety Data Sheets HyperGlossary

Tech (1 matching dictionary)

24. AUTOMOTIVE TERMS (No longer online)

Definitions from Wiktionary (atomic mass) ▸ noun:  The mass of an atom. ▸ noun:  (proscribed) atomic weight; the average mass of atoms of an element. Similar: atomic mass unit, average atomic mass, mass number, atomic mass number, gram atom, atomic weight, dalton, unified atomic mass unit, molecular mass, nucleon number, more... Opposite: atomic weight, atomic number, atomic density Phrases: atomic mass unit, relative atomic mass, atomic mass units, atomic mass number, unified atomic mass unit, more... ▸ Words similar to atomic mass ▸ Usage examples for atomic mass ▸ Idioms related to atomic mass ▸ Wikipedia articles (New!) ▸ Words that often appear near atomic mass ▸ Rhymes of atomic mass ▸ Invented words related to atomic mass