We found 27 dictionaries that define the word atomic mass unit:

General (16 matching dictionaries)

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

Business (2 matching dictionaries)

17. atomic mass unit: Legal dictionary
18. atomic mass unit: Financial dictionary

Computing (1 matching dictionary)

19. Atomic mass unit (amu), atomic mass unit: Encyclopedia

Medicine (4 matching dictionaries)

20. atomic mass unit: Merriam-Webster Medical Dictionary
21. Dorland's Illustrated Medical Dictionary (No longer online)
22. online medical dictionary (No longer online)
23. Atomic mass unit (amu), atomic mass unit: Medical dictionary

Science (4 matching dictionaries)

24. Chemistry Dictionary (No longer online)
25. Atomic Mass Unit: Eric Weisstein's World of Physics
26. Atomic Mass Unit: Extragalactic Astronomy
27. How Many? A Dictionary of Units of Measurement (No longer online)

(Note: See atomic_mass_units as well.)

Definitions from Wiktionary (atomic mass unit) ▸ noun:  (physical chemistry) A unit of mass equal to 1/12 the mass of an atom of ¹²C (carbon-12, an isotope of carbon). Similar: unified atomic mass unit, atomic mass, Avogadro constant, Avogadro's number, dalton, Avogadro's constant, atomic mass number, gram atom, mass number, atomic weight, more... Types: Dalton, amu, more... Phrases: unified atomic mass unit, atomic mass unit (amu), more... ▸ Words similar to atomic mass unit ▸ Usage examples for atomic mass unit ▸ Idioms related to atomic mass unit ▸ Wikipedia articles (New!) ▸ Words that often appear near atomic mass unit ▸ Rhymes of atomic mass unit ▸ Invented words related to atomic mass unit