diverging lens: a lens such that a parallel beam of light passing through it is caused to diverge or spread out
lens: a transparent optical device used to converge or diverge transmitted light and to form images
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