1. a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon; - Example: "one milligram of ricin can kill an adult" [syn: ricin, ricin toxin]
WordNet (r) 3.0 (2006):
ricin
n 1: a toxic protein extracted from castor beans; used as a
chemical reagent; can be used as a bioweapon; "one
milligram of ricin can kill an adult" [syn: ricin, ricin
toxin]