What does "ricin" mean?

An extremely toxic lectin extracted from the castor bean.

What is a synonym for "ricin"?

Common synonyms include: ricin toxin.

/ˈɹaɪsɪn/ noun

noun ·Rare ·Advanced level

Noun

1
An extremely toxic lectin extracted from the castor bean. uncountable
"It had to be one of three things: A hoax. Or anthrax, which meant I’d have to go on Cipro for a month. Or if it was ricin, I was dead, so bye-bye."
2
a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon wordnet

"It had to be one of three things: A hoax. Or anthrax, which meant I’d have to go on Cipro for a month. Or if it was ricin, I was dead, so bye-bye."

From Latin ricinus.