Webster's Revised Unabridged Dictionary · 1913

horsebean

horsebean , noun

1.
The seed of the broad-bean plant.
2.
A large shrub or shrubby tree (Parkinsonia aculeata) 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; originating in tropical America but naturalized in the Southern U. S.