polyphenol

1. (organic chemistry, biochemistry) Any of a large class of organic compounds, of plant origin, having more than one phenol group; they tend to be colourful and to have antioxidant properties.Examples: "Fruits, vegetables, whole grains and other plant foods, like nuts and legumes, are rich in polyphenols — antioxidant and anti-inflammatory compounds that some research suggests can support healthy aging."