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A poisonous protein extracted from the castor bean and used as a biochemical reagent.
[German Ricin, from New Latin Ricinus, castor-oil plant genus, from Latin ricinus, sheep tick, castor-oil plant (the plant being so called from the ticklike appearance of castor beans ), of unknown origin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biochemistry) biochem a highly toxic protein, a lectin, derived from castor-oil seeds: used in experimental cancer therapy
[C19: from New Latin Ricinus genus name, from Latin: castor-oil plant]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ri•cin(ˈraɪ sɪn, ˈrɪs ɪn)
a white, poisonous, protein powder from the bean of the castor-oil plant.
[1895–1900; < New Latin Ricinus genus name, Latin: castor-oil plant, literally, tick (parasite)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||ricin - a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon; "one milligram of ricin can kill an adult"|
toxin - a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
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