We found 22 dictionaries that define the word atto:

General (12 matching dictionaries)

1. atto-: Merriam-Webster
2. atto-: Oxford Learner's Dictionaries
3. atto-: American Heritage Dictionary of the English Language
4. atto-, atto-: Collins English Dictionary
5. Atto, atto: Wordnik
6. atto-: Wiktionary
7. atto-: Webster's New World College Dictionary, 4th Ed.
8. atto-: Infoplease Dictionary
9. ATTO, atto-: Dictionary.com
10. Atto-, Atto (archbishop of Milan), Atto: Wikipedia, the Free Encyclopedia
11. atto: AllWords.com Multi-Lingual Dictionary
12. atto-: TheFreeDictionary.com

Art (1 matching dictionary)

13. atto-: A Cross Reference of Latin and Greek Elements

Computing (3 matching dictionaries)

14. atto-: Free On-line Dictionary of Computing
15. atto-: CCI Computer
16. Atto (disambiguation), atto, atto-: Encyclopedia

Medicine (2 matching dictionaries)

17. online medical dictionary (No longer online)
18. atto-: Medical dictionary

Miscellaneous (1 matching dictionary)

19. ATTO: Acronym Finder

Science (3 matching dictionaries)

20. Atto: Eric Weisstein's World of Physics
21. Atto-: Extragalactic Astronomy
22. How Many? A Dictionary of Units of Measurement (No longer online)

Definitions from Wiktionary (Atto) ▸ noun:  A male given name of historical usage. Similar: Atrius, Hatto, Athan, Adelard, Achaius, Aetius, Agathon, Antonio, Anthony, Anatolius, more... Opposite: exa, tera, giga, mega, kilo Phrases: Osman Ali Atto, more... ▸ Words similar to atto ▸ Usage examples for atto ▸ Idioms related to atto ▸ Wikipedia articles (New!) ▸ Popular adjectives describing atto ▸ Words that often appear near atto ▸ Rhymes of atto ▸ Invented words related to atto