Metcalfe bean
noun
Met·calfe bean
| \ ˈmetˌkaf-, -kəf-, -ˌkȧf\
Definition of Metcalfe bean
1
: a prostrate perennial bean (Phaseolus metcalfei) of the southwestern U.S. and adjacent Mexico that is sometimes cultivated for forage
2
: the flat circular brownish black seed of the Metcalfe bean
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