from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A poisonous protein found in the seeds of the rosary pea.
from The Century Dictionary and Cyclopedia
- n. A name given to a poisonous principle obtained from Abrus precatorius.
New Latin Abrus, rosary pea genus (from Greek habros, graceful, delicate) + -in.(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin Abrus ("genus of the species source of the bean") + -in (Wiktionary)