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abrin

Today it means: A toxin, akin to ricin, found in jequirity beans (Abrus precatorius). Full definition →

First used First attested in the late 19ᵗʰ century.

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The story

From taxonomic name Abrus (genus of the species source of the bean) + -in.

First known use, by meaning

First attested in the late 19ᵗʰ century. A toxin, akin to ricin, found in jequirity beans (Abrus precatorius).

Etymology from Wiktionary, CC BY-SA 4.0.