from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A poisonous protein extracted from the castor bean and used as a biochemical reagent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A toxic protein extracted from the castor bean.
from The Century Dictionary and Cyclopedia
- n. An albuminoid substance of poisonous character obtained in small quantity from the seeds of the castor-oil plant, Ricinus communis.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon
From Latin ricinus, castor-oil plant.(American Heritage® Dictionary of the English Language, Fourth Edition)