field bean

noun4

1. •
   Any of several varieties of bean viewed (in a region's agroeconomy) as a commodity crop grown at scale in farm fields, whether as a food crop, fodder crop, or both.
2. •
   The hyacinth bean: Lablab purpureus.
3. •
   A string bean, especially Phaseolus vulgaris.
4. •
   The broad bean: Vicia faba.