n. 1. (Physical Geography). a. the inundation of land that is normally dry through the overflowing of a body of water, esp a river. b. the state of a river that is at an abnormally high level (esp in the phrase in flood).
The U.S. Food and Drug Administration (FDA) is an agency of the United States Department of Health and Human Services and is responsible for the safety regulation of most types of foods, dietary supplements, drugs, vaccines, biological medical products, blood products, medical devices, radiation-emitting devices, veterinary products, and cosmetics.
From a food science perspective, it is difficult to define a food product that is 'natural' because the food has probably been processed and is no longer the product of the earth. That said, FDA has not developed a definition for use of the term natural or its derivatives.