a prostrate milk vetch, Astragalus crassicarpus, of the legume family, growing in the prairie regions of North America.
its plum-shaped fruit.
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Origin of ground plum
An Americanism dating back to 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for ground plum
a North American leguminous plant, Astragalus caryocarpus, with purple or white flowers and green thick-walled plumlike edible pods
the pod of this plant
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