Definition of ricin in English:


Syllabification: ri·cin
Pronunciation: /ˈrīsən, ˈris-


  • A highly toxic protein obtained from the pressed seeds of the castor-oil plant.
    More example sentences
    • There was a previous radiation study of ricin, a dimeric molecule linked by a single disulfide bridge.
    • Signs and symptoms of ricin poisoning depend on whether a person inhales or ingests ricin.
    • Studies have been performed on ricin as a possible anticancer agent.


late 19th century: from modern Latin Ricinus communis (denoting the castor-oil plant) + -in1.

More definitions of ricin

Definition of ricin in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day milord
Pronunciation: məˈlôrd
used to address an English nobleman