- a white, poisonous, protein powder from the bean of the castor-oil plant.
Origin of ricin
Examples from the Web for ricin
Walter returns to the house to retrieve the vile of ricin he hid there in the previous finale.‘Breaking Bad’ and TV’s Five Most Shocking Flash-Forward Scenes
August 12, 2013
Could a mind-boggling vendetta be behind the ricin letters sent to Obama and Wicker?Paul Kevin Curtis and J. Everett Dutschke: Epic Feud and Ricin Letters
April 25, 2013
What happened besides the Boston Marathon bombing, ricin attacks, and the massive Texas explosion?Overlooked Stories of the Week: Torture Report, Venezuela & More
April 20, 2013
Once again, cable news channels are wall to wall with bombing and ricin coverage.Washington Unnerved by Boston Bombing, Ricin Letters: Echoes of 9/11
April 18, 2013
He also had an encounter with Roger Wicker, one of the recipients of the ricin letters.A Few Things to Know About Paul Kevin Curtis, the Crazy Ricin Suspect
April 18, 2013
By George, though, that Paoli must be a clever one—think of his knowing about ricin.The Silent Bullet
Arthur B. Reeve
- biochem a highly toxic protein, a lectin, derived from castor-oil seeds: used in experimental cancer therapy
Word Origin and History for ricin
poison obtained from the castor-oil bean, 1888, from ricinus, genus name of the castor-oil plant (1694), from Latin ricinus (Pliny), of uncertain origin, perhaps the same word as ricinus "tick" (in sheep, dogs, etc.).
- A poisonous protein that is extracted from the castor bean and is used as a biochemical reagent.
- An extremely poisonous protein extracted from the castor bean. Ricin inhibits protein synthesis in cells, and is used as a biochemical reagent and in cancer research.