found: Work cat: Femrite, A.C. The influence of recess placement and lunch length on consumption of lunch in elementary school children, 2003:leaf 23 (plate waste is defined as the proportion of food served that is uneaten, the amount of calories uneaten, or the amount of the nutrients uneaten ... Plate waste is generally measured by either visual measurements by trained observers, food recall by children, or physical measurements)
found: Barnett, L.C. Plate waste and nutrient consumption in elementary school lunch, 2000.
found: OCLC WorldCat, Sept. 9, 2011(title search: "Plate waste" = 72 items)
found: Just eat it: a food waste story, 2015:container (Filmakers and food lovers Jen and Grant dive into the issue of waste from farm, through retail, all the way to the back of their own fridge. After catching a glimpse of the billions of dollars of good food that is tossed each year in North America, they pledge to quit grocery shopping cold turkey and survive only on foods that would otherwise be thrown away)
found: Environmental Protection Agency web site, Aug. 10, 2015(Wastes--Resource Conservation--Food Wastes--Food Recovery Hierarchy: the Food Recovery Hierarchy prioritizes actions organizations can take to prevent and divert wasted food)
found: Google search, Aug. 10, 2015("food waste" = About 6,520,000 results; "plate waste" = About 52,800 results; "wasted food" = About 349,000 results)