We found 20 dictionaries that define the word onomasticon:

General (17 matching dictionaries)

1. onomasticon: Merriam-Webster
2. onomasticon: Collins English Dictionary
3. onomasticon: Vocabulary.com
4. Onomasticon, onomasticon: Wordnik
5. onomasticon: Wiktionary
6. onomasticon: Infoplease Dictionary
7. Onomasticon, onomasticon: Dictionary.com
8. Onomasticon (Eusebius), Onomasticon: Wikipedia, the Free Encyclopedia
9. Onomasticon: Online Plain Text English Dictionary
10. onomasticon: Webster's Revised Unabridged, 1913 Edition
11. onomasticon: Rhymezone
12. Onomasticon: AllWords.com Multi-Lingual Dictionary
13. onomasticon: FreeDictionary.org
14. onomasticon: The Phrontistery - A Dictionary of Obscure Words
15. onomasticon: Mnemonic Dictionary
16. Onomasticon: TheFreeDictionary.com
17. Onomasticon: World Wide Words

Medicine (1 matching dictionary)

18. online medical dictionary (No longer online)

Miscellaneous (1 matching dictionary)

19. onomasticon: Wordcraft Dictionary

Science (1 matching dictionary)

20. Archaeology Wordsmith (No longer online)

(Note: See onomasticons as well.)

Definitions from Wiktionary (onomasticon) ▸ noun:  A book, list, or vocabulary of names, especially of people. Similar: monasticon, nomisma, menologium, scribedom, synaxarium, iconostas, aeolodion, Catholicon, Almagest, athenaeum, more... Opposite: offomasticon, antonomasia Adjectives: arabic, biblical, semitic, famous, local, west, egyptian, arthurian, israelite, century, early ▸ Words similar to onomasticon ▸ Usage examples for onomasticon ▸ Idioms related to onomasticon ▸ Wikipedia articles (New!) ▸ Popular adjectives describing onomasticon ▸ Words that often appear near onomasticon ▸ Rhymes of onomasticon ▸ Invented words related to onomasticon