We found 31 dictionaries that define the word ricin:

General (20 matching dictionaries)

1. ricin: Longman Dictionary of Contemporary English
2. ricin: Merriam-Webster
3. ricin: Oxford Learner's Dictionaries
4. ricin: American Heritage Dictionary of the English Language
5. ricin: Collins English Dictionary
6. ricin: Vocabulary.com
7. Ricin, ricin: Wordnik
8. ricin: Cambridge Advanced Learner's Dictionary
9. ricin: Wiktionary
10. ricin: Webster's New World College Dictionary, 4th Ed.
11. ricin: Infoplease Dictionary
12. ricin: Dictionary.com
13. ricin: Online Etymology Dictionary
14. Ricin: Wikipedia, the Free Encyclopedia
15. ricin: Rhymezone
16. ricin: FreeDictionary.org
17. ricin: Mnemonic Dictionary
18. ricin: TheFreeDictionary.com

Computing (1 matching dictionary)

19. ricin: Encyclopedia

Medicine (7 matching dictionaries)

20. ricin: Merriam-Webster Medical Dictionary
21. Dorland's Illustrated Medical Dictionary (No longer online)
22. Ricin: MedTerms.com Medical Dictionary
23. Medical Dictionary (No longer online)
24. online medical dictionary (No longer online)
25. ricin: Medical dictionary
26. Ricin: Drug Medical Dictionary

Miscellaneous (1 matching dictionary)

27. Glossary of Terrorism Terms (No longer online)

Science (1 matching dictionary)

28. Glossary of Roots of Botanical Names (No longer online)

Slang (1 matching dictionary)

29. Ricin: Urban Dictionary

(Note: See ricins as well.)

Definitions from Wiktionary ( ) ▸ noun:  (biochemistry, toxicology) An extremely toxic lectin extracted from the castor bean. Similar: ricinine, ricinism, antiricin, ricinelaidate, royalisin, rhizotoxin, ruscin, equinatoxin, erabutoxin, bassiacridin, more... Types: poison, toxin, venom, more... Phrases: ricin toxin, 2003 ricin letters, April 2013 ricin letters, more... Adjectives: toxic, intact, whole, native, deglycosylated, deadly, free, anti, crystalline, biological, poisonous ▸ Word origin ▸ Words similar to ricin ▸ Usage examples for ricin ▸ Idioms related to ricin ▸ Wikipedia articles (New!) ▸ Popular adjectives describing ricin ▸ Words that often appear near ricin ▸ Rhymes of ricin ▸ Invented words related to ricin