Metcalfe bean
noun
Met·calfe bean
ˈmetˌkaf-,
-kəf-,
-ˌkȧf
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
Word History
Etymology
after J. K. Metcalfe who introduced it to the southwestern U.S. in the late 19th century