Noun horse bean has 2 senses
  1. broad bean, fava bean, horsebean - seed of the broad-bean plant
    --1 is a kind of fodder; bean, bean plant
    --1 is a part of
     broad bean, broad-bean, broad-bean plant, English bean, European bean, field bean, Vicia faba; 1 of 2 senses of horsebean ; broad bean, fava bean, horsebean; broad bean, broad-bean, broad-bean plant, English bean, European bean, field bean, Vicia faba
  2. Jerusalem thorn, horsebean, Parkinsonia aculeata - large shrub or shrubby tree having sharp spines and pinnate leaves with small deciduous leaflets and sweet-scented racemose yellow-orange flowers; grown as ornamentals or hedging or emergency food for livestock; tropical America but naturalized in southern United States
    --2 is a kind of shrub, bush
    --2 is a member of Parkinsonia, genus Parkinsonia
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