a bushy tropical plant, Canavalia ensiformis, of the legume family, grown especially for forage.
the white seeds of this plant.
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Origin of jack bean
First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for jack bean
Historical Examples of jack bean
Dorinda stood under the jack-bean vines, blossoming purple and white, and watched the men as they silently rode away.The Prophet of the Great Smoky Mountains
Charles Egbert Craddock
a tropical American leguminous plant, Canavalia ensiformis, that has clusters of purple flowers and long pods and is grown in the southern US for forage
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012