n. 1  Any of various small proteins that are produced by a variety of cell types, especially T cells and other white blood cells, and that regulate many aspects of inflammation and the immune response, including stimulating the production of white blood cells and platelets.
Arrowroot is an easily digested starch extracted from the roots of the arrowroot plant, Maranta arundinacea. The starch is used as a thickener in many foods such as puddings and sauces, and is also used in cookies and other baked goods. It is extremely bland, making it suitable for neutral diets, especially for people who are feeling nauseous.
What They Are. Arrowroot starch is made from the dried rootstock of the arrowroot plant, which is then ground into a white powder. The name comes from the manner in which it was used by the South American Aruac Indians, who saw it as an antidote for poisonous arrows.