"Ricin" is a poisonous substance that comes from the seeds of the castor oil plant. It can cause severe sickness and even death if it is ingested or enters the body. Full definition
The FBI and Vermont police were investigating the discovery of the deadly toxin ricin found at a Vermont retirement community. (nystateofpolitics.com)
Doctors need some way to deal with ricin poisoning, said Patrick Cherubin, a cell biologist at the University of Central Florida in Orlando. (sciencenews.org)
Some agglutinins, such as ricin (from castor beans), is so toxic that as little as one milligram — the size of a grain of rice — inhaled or injected is deadly. (foodsafetymagazine.com)