ricin

[ rahy-sin, ris-in ]

Phonetic (Standard)IPA

noun

, Chemistry.

ricin

/ ˈrɪs-; ˈraɪsɪn /

biochem a highly toxic protein, a lectin, derived from castor-oil seeds: used in experimental cancer therapy

ricin

/ rī′sĭn,rĭs′ĭn /

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.

Origin of ricin¹

1895–1900; < New Latin Ricinus name of genus, Latin: castor-oil plant

Origin of ricin¹

C19: from New Latin Ricinus genus name, from Latin: castor-oil plant

Walter returns to the house to retrieve the vile of ricin he hid there in the previous finale.

Jesse was relieved, and so was Walt—he had already concealed the real ricin capsule behind an electrical outlet in his bedroom.

The signature of the ricin-laced envelope: “I am KC and I approve this message.”

Could a mind-boggling vendetta be behind the ricin letters sent to Obama and Wicker?

Kevin Curtis is nowhere near smart enough to figure out how to make ricin, she tells The Daily Beast.

By George, though, that Paoli must be a clever one—think of his knowing about ricin.

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