Term: arum: starch resembling sago that is obtained from cuckoopint root
Broader: starch: a complex carbohydrate found chiefly in seeds, fruits, tubers, roots and stem pith of plants, notably in corn, potatoes, wheat, and rice; an important foodstuff and used otherwise especially in adhesives and as fillers and stiffeners for paper and textiles | Unrelated: trade policy: a government's policy controlling foreign trade