Webster’s Revised Unabridged Dictionary · 1913
Breadroot
Bread′root′ (·ro͞ot′), n. (Bot.) The root of a leguminous plant (Psoralea esculenta), found near the Rocky Mountains. It is usually oval in form, and abounds in farinaceous matter, affording sweet and palatable food.
☞ It is the Pomme blanche of Canadian voyageurs.