ricin
Noun
Meaning
a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon
Source: WordNetSynonyms
Hypernyms
Examples
one milligram of ricin can kill an adult
Ehrlich interpreted this as immunization and observed that it was abruptly initiated after a few days and was still in existence after several months, but mice immunized against ricin were just as sensitive to abrin as untreated animals.
In August 1971 the KGB allegedly made an attempt to assassinate Solzhenitsyn using an unknown biological agent (most likely ricin ) with an experimental gel-based delivery method.
Note that two of these targets are toxins (botulinum and ricin) while the remainder are infectious agents.